core: Install new files gpgrt.m4 and gpgrt-config.
* src/gpgrt.m4: New. Bascially a copy of libgpg-error.m4 * src/gpg-error-config.in: Decide which name to print. * src/Makefile.am (nodist_bin_SCRIPTS): Add gpgrt-config. (m4data_DATA): Add gpgrt.m4 (EXTRA_DIST): Add gpgrt.m4. (BUILT_SOURCES): Add gpgrt-config. (CLEANFILES): Add gpgrt-config. (gpgrt-config): Create from gpg-error-config.
These files can be used instead of gpg-error-config or gpg-error.m4.
The hope is that providing them early will ease an eventual migration
from libgpg-error to libgpgrt easier.
- Signed-off-by: Werner Koch <wk@gnupg.org>