configure.in -> configure.ac rename

Signed-off-by: Jaroslav Kysela <perex@perex.cz>

gitcompile

@@ -6,11 +6,11 @@ fi
 aclocal $alsa_m4_flags $ACLOCAL_FLAGS
 # save original files to avoid stupid modifications by gettextize
 cp Makefile.am Makefile.am.ok
-cp configure.in configure.in.ok
+cp configure.ac configure.ac.ok
 gettextize -c -f --no-changelog
 echo "EXTRA_DIST = gettext.m4" > m4/Makefile.am
 cp Makefile.am.ok Makefile.am
-cp configure.in.ok configure.in
+cp configure.ac.ok configure.ac
 autoheader
 automake --foreign --copy --add-missing
 touch depcomp		# for older automake

include/Makefile.am

@@ -3,7 +3,7 @@ noinst_HEADERS=version.h gettext.h gettext_curses.h
 version.h: stamp-vh
 	@:
 
-stamp-vh: $(top_builddir)/configure.in
+stamp-vh: $(top_builddir)/configure.ac
 	@echo "/*" > ver.tmp
 	@echo " *  version.h" >> ver.tmp
 	@echo " */" >> ver.tmp