doc: Get rid of version.texi
* configure.ac (CC_FOR_BUILD): New. * doc/mkdefsinc.c: New. Taken from GnuPG and modified for gpgme. * doc/Makefile.am (EXTRA_DIST): Add defsincdate and mkdefsinc.c (BUILT_SOURCES): new. (gpgme.texi): New dependency. (mkdefsinc, defsincdate, defs.inc): New rules. (dist-hook): New. * doc/gpgme.texi: Include defs.inc. Remove version.texi.
That new system should also yield more approriate date infos for the
manual.
- GnuPG-bug-id: T2352