Add macros for packages in extra architecture
This is a requirement to build gpgEx both for x86 and amd64 architectures. * m4/gpg4win.m4 (GPG4WIN_CHECK_EXDEPS, GPG4WIN_SPKGEX): New. * src/gpg4win.mk.in (SETVARS_EX, STRIP_EX, GETDEPS_EX): New helper macros for building in another architecture. * src/gpg4win.mk.in (EXPKG_template): New template to build for an additional host as defined by GPGEX_ADD_HOST
- If we build for another architecture we now use an additional install-ex directory in which we install and stow the packages needed in a different architecture. The GPG4WIN_SPKGEX macro can be used to mark down packages that should be built in both the host architecture and in an additional architecture defined by GPGEX_ADD_HOST.