update gnulib

This comes from gnulib 348402f2aac342bc925b7aaea9ee3cc353f427a9 plus
a custom patch to support compilation of arpg in C++11.

* lib/hard-locale.c, lib/hard-locale.h, m4/hard-locale.m4, m4/ltargz.m4:
New files.
* lib/Makefile.am, lib/alloca.in.h, lib/argmatch.c, lib/argmatch.h,
lib/argp-ba.c, lib/argp-eexst.c, lib/argp-fmtstream.c,
lib/argp-fmtstream.h, lib/argp-fs-xinl.c, lib/argp-help.c,
lib/argp-namefrob.h, lib/argp-parse.c, lib/argp-pin.c, lib/argp-pv.c,
lib/argp-pvh.c, lib/argp-xinl.c, lib/argp.h, lib/asnprintf.c,
lib/basename-lgpl.c, lib/c-ctype.h, lib/c-strcase.h, lib/c-strcasecmp.c,
lib/c-strcaseeq.h, lib/c-strncasecmp.c, lib/config.charset,
lib/dirname-lgpl.c, lib/dirname.h, lib/dosname.h, lib/errno.in.h,
lib/error.c, lib/error.h, lib/exitfail.c, lib/exitfail.h,
lib/fcntl.in.h, lib/float+.h, lib/float.c, lib/float.in.h, lib/getopt.c,
lib/getopt.in.h, lib/getopt1.c, lib/getopt_int.h, lib/gettext.h,
lib/gettimeofday.c, lib/hard-locale.h, lib/intprops.h, lib/isatty.c,
lib/itold.c, lib/localcharset.c, lib/localcharset.h, lib/lstat.c,
lib/malloc.c, lib/mbrtowc.c, lib/mbsinit.c, lib/memchr.c, lib/mempcpy.c,
lib/mkstemp.c, lib/mkstemps.c, lib/msvc-inval.c, lib/msvc-inval.h,
lib/msvc-nothrow.c, lib/msvc-nothrow.h, lib/pathmax.h,
lib/printf-args.c, lib/printf-args.h, lib/printf-parse.c,
lib/printf-parse.h, lib/progname.c, lib/progname.h, lib/quote.h,
lib/quotearg.c, lib/quotearg.h, lib/rawmemchr.c, lib/ref-add.sin,
lib/ref-del.sin, lib/secure_getenv.c, lib/size_max.h, lib/sleep.c,
lib/stat.c, lib/stdalign.in.h, lib/stdbool.in.h, lib/stddef.in.h,
lib/stdint.in.h, lib/stdio.in.h, lib/stdlib.in.h, lib/stpcpy.c,
lib/strcasecmp.c, lib/strchrnul.c, lib/streq.h, lib/strerror-override.c,
lib/strerror-override.h, lib/strerror.c, lib/string.in.h,
lib/strings.in.h, lib/stripslash.c, lib/strncasecmp.c, lib/strndup.c,
lib/strnlen.c, lib/strverscmp.c, lib/sys_stat.in.h, lib/sys_time.in.h,
lib/sys_types.in.h, lib/sys_wait.in.h, lib/sysexits.in.h,
lib/tempname.c, lib/tempname.h, lib/time.in.h, lib/unistd.in.h,
lib/vasnprintf.c, lib/vasnprintf.h, lib/verify.h, lib/vsnprintf.c,
lib/wchar.in.h, lib/wctype.in.h, lib/xalloc-die.c,
lib/xalloc-oversized.h, lib/xalloc.h, lib/xmalloc.c, lib/xsize.h,
m4/00gnulib.m4, m4/absolute-header.m4, m4/alloca.m4, m4/argp.m4,
m4/codeset.m4, m4/configmake.m4, m4/dirname.m4, m4/double-slash-root.m4,
m4/errno_h.m4, m4/error.m4, m4/exponentd.m4, m4/extensions.m4,
m4/extern-inline.m4, m4/fcntl-o.m4, m4/fcntl_h.m4, m4/float_h.m4,
m4/getopt.m4, m4/gettimeofday.m4, m4/glibc21.m4, m4/gnulib-cache.m4,
m4/gnulib-common.m4, m4/gnulib-comp.m4, m4/gnulib-tool.m4,
m4/include_next.m4, m4/intmax_t.m4, m4/inttypes_h.m4, m4/isatty.m4,
m4/largefile.m4, m4/localcharset.m4, m4/locale-fr.m4, m4/locale-ja.m4,
m4/locale-zh.m4, m4/longlong.m4, m4/lstat.m4, m4/malloc.m4,
m4/math_h.m4, m4/mbrtowc.m4, m4/mbsinit.m4, m4/mbstate_t.m4,
m4/memchr.m4, m4/mempcpy.m4, m4/mkstemp.m4, m4/mkstemps.m4,
m4/mmap-anon.m4, m4/msvc-inval.m4, m4/msvc-nothrow.m4, m4/multiarch.m4,
m4/nocrash.m4, m4/off_t.m4, m4/pathmax.m4, m4/printf.m4, m4/quote.m4,
m4/quotearg.m4, m4/rawmemchr.m4, m4/secure_getenv.m4, m4/size_max.m4,
m4/sleep.m4, m4/ssize_t.m4, m4/stat.m4, m4/stdalign.m4, m4/stdbool.m4,
m4/stddef_h.m4, m4/stdint.m4, m4/stdint_h.m4, m4/stdio_h.m4,
m4/stdlib_h.m4, m4/stpcpy.m4, m4/strcase.m4, m4/strchrnul.m4,
m4/strerror.m4, m4/string_h.m4, m4/strings_h.m4, m4/strndup.m4,
m4/strnlen.m4, m4/strverscmp.m4, m4/sys_socket_h.m4, m4/sys_stat_h.m4,
m4/sys_time_h.m4, m4/sys_types_h.m4, m4/sys_wait_h.m4, m4/sysexits.m4,
m4/tempname.m4, m4/time_h.m4, m4/unistd_h.m4, m4/vasnprintf.m4,
m4/vsnprintf.m4, m4/warn-on-use.m4, m4/wchar_h.m4, m4/wchar_t.m4,
m4/wctype_h.m4, m4/wint_t.m4, m4/xalloc.m4, m4/xsize.m4,
tests/core/randtgba.cc, tools/snippet/arg-nonnull.h,
tools/snippet/c++defs.h, tools/snippet/warn-on-use.h: Update.

lib/hard-locale.c

@@ -0,0 +1,72 @@
+/* hard-locale.c -- Determine whether a locale is hard.
+
+   Copyright (C) 1997-1999, 2002-2004, 2006-2007, 2009-2016 Free Software
+   Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#include "hard-locale.h"
+
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef __GLIBC__
+# define GLIBC_VERSION __GLIBC__
+#elif defined __UCLIBC__
+# define GLIBC_VERSION 2
+#else
+# define GLIBC_VERSION 0
+#endif
+
+/* Return true if the current CATEGORY locale is hard, i.e. if you
+   can't get away with assuming traditional C or POSIX behavior.  */
+bool
+hard_locale (int category)
+{
+  bool hard = true;
+  char const *p = setlocale (category, NULL);
+
+  if (p)
+    {
+      if (2 <= GLIBC_VERSION)
+        {
+          if (strcmp (p, "C") == 0 || strcmp (p, "POSIX") == 0)
+            hard = false;
+        }
+      else
+        {
+          char *locale = strdup (p);
+          if (locale)
+            {
+              /* Temporarily set the locale to the "C" and "POSIX" locales
+                 to find their names, so that we can determine whether one
+                 or the other is the caller's locale.  */
+              if (((p = setlocale (category, "C"))
+                   && strcmp (p, locale) == 0)
+                  || ((p = setlocale (category, "POSIX"))
+                      && strcmp (p, locale) == 0))
+                hard = false;
+
+              /* Restore the caller's locale.  */
+              setlocale (category, locale);
+              free (locale);
+            }
+        }
+    }
+
+  return hard;
+}