Reorder Makefile variable setting and change some names.
* src/gpg4win.mk.in: Move setting of bdir, idir, et all to ... * src/Makefile.am: here, where we already set the root dir var. (native_idir): Rename to nat_idir. Change all users. (native_ipdir): Rename to nat_ipdir. Change all users. * src/gpg4win.mk.in (pkgpbdir): Rename to pkgpatbdir. (pkgpdir): Rename to pkgpatdir.
This should make things easier to understand. Also documented the
directory names.