Update gnulib
* autogen.sh (GNULIB_MODULES_TOOLS_FOR_SRC): Explicitly pull 'gettext',
as the module is now marked as obsolete.
* gnulib-local/Makefile.am (EXTRA_DIST): Remove m4/hard-locale.m4.diff.
* gnulib-local/m4/hard-locale.m4.diff: Remove, as it is no longer
needed.
* gettext-tools/gnulib-lib/.gitignore: Ignore files brought by gnulib-tool.
* gettext-tools/gnulib-tests/.gitignore: Likewise.
* gettext-tools/libgettextpo/.gitignore: Likewise.
