sanity: do not check source files in *.dir/*

Because gal2c generates some C++ sources that do not match our coding
convention and should not be checked.

* tests/sanity/80columns.test, tests/sanity/style.test: Do not test
files in tests' work directories.

tests/sanity/80columns.test

@@ -48,7 +48,9 @@ for dir in "${srcdir-.}/../../spot" "${srcdir-.}/.."; do
                  -o -name "${1-*}.hxx" \
                  -o -name "${1-*}.cc" \
                  -o -name "${1-*}.py" \
-		 -o -name "${1-*}.test" \) -a -type f -a -print |
+		 -o -name "${1-*}.test" \) \
+                 -a -not -path '*.dir/*' \
+                 -a -type f -a -print |
   while read file; do
      if (expand $file | grep -q $x) 2>/dev/null; then
 	if grep 'GNU Bison' "$file" >/dev/null ||