Fix macro file 'serial' numbers for 'aclocal --install'.
* gettext-runtime/m4/gettext.m4: Make 'serial' effective.
* gettext-runtime/m4/glibc2.m4: Likewise.
* gettext-runtime/m4/nls.m4: Likewise.
* gettext-runtime/m4/po.m4: Likewise.
* gettext-runtime/m4/progtest.m4: Likewise.
* gettext-tools/m4/exported.m4: Likewise.
* gettext-tools/m4/hostname.m4: Likewise.
* gettext-tools/m4/locale-de.m4: Likewise.
* libtextstyle/gnulib-local/m4/libcroco.m4: Likewise.
* libtextstyle/gnulib-local/m4/libglib.m4: Likewise.
* libtextstyle/gnulib-local/m4/moo.m4: Likewise.
* libtextstyle/gnulib-local/m4/term-ostream.m4: Likewise.
* libtextstyle/m4/init-package-version.m4: Likewise.
* m4/fixautomake.m4: Likewise.
* m4/more-warnings.m4: Likewise.
* m4/woe32-dll.m4: Likewise.
* gnulib-local/m4/java.m4: Likewise.
* gnulib-local/m4/libxml.m4: Likewise.
* gnulib-local/m4/backupfile.m4: Likewise. Make sure to override the gnulib
version.
