w32: Add a manifest to libgpg-error.
* src/gpg-error.w32-manifest.in: New. * src/Makefile.am (EXTRA_DIST): Add it. (versioninfo.lo): Depend on it. * src/versioninfo.rc.in: Add it. * configure.ac (AC_CONFIG_FILES): Add it. (BUILD_VERSION): New.
- Signed-off-by: Werner Koch <wk@gnupg.org>