build: Optionally, add host value to gpgmepp's pkgconfig file
* CMakeLists.txt: Add option PKGCONFIG_HOST (default ""). * src/CMakeLists.txt: Set replacement for pkgconfig_host_line variable referenced in gpgmepp.pc.in if PKGCONFIG_HOST is set. * src/gpgmepp.pc.in: Add placeholder for pkgconfig_host_line.
This allows us to set the host in our gpg4win build for the 32-bit
build and the 64-bit build of gpgmepp to prevent usage of the wrong
build.
- GnuPG-bug-id: T7262