* src/ltltest/defs.in (run): New function, run valgrind.

* src/ltltest/equals.test, src/ltltest/lunabbrev.test,
src/ltltest/nenoform.test, src/ltltest/parse.test,
src/ltltest/parseerr.test, src/ltltest/tostring.test,
src/ltltest/tunabbrev.test, src/ltltest/tunenoform.test: Use run().
* Makefile.am (EXTRA_DIST): Don't list the m4/*.m4 files,
Automake 1.8 find them automatically.
* configure.ac: Require Automake 1.8, in gnits mode, and check
for valgrind.
* THANKS: New empty file.

Makefile.am

@@ -29,14 +29,4 @@ endif WITH_INCLUDED_LBTT
 SUBDIRS = $(MAYBE_BUDDY) $(MAYBE_LBTT) doc src wrap iface
 
 ACLOCAL_AMFLAGS = -I m4
-EXTRA_DIST = \
-  m4/buddy.m4 \
-  m4/debug.m4 \
-  m4/devel.m4 \
-  m4/gccoptim.m4 \
-  m4/gccwarn.m4 \
-  m4/gspnlib.m4 \
-  m4/lbtt.m4 \
-  m4/ndebug.m4 \
-  m4/pypath.m4 \
-  HACKING
+EXTRA_DIST = HACKING