w32: Add new global flag "w32-inst-dir".
* src/gpgme.c (gpgme_set_global_flag): Add flag "w32-inst-dir"; * src/posix-util.c (_gpgme_set_override_inst_dir): New stub. * src/w32-util.c (override_inst_dir): New var. (_gpgme_get_inst_dir): Return this var is set. (_gpgme_set_override_inst_dir): New.
See
https://lists.gnupg.org/pipermail/gnupg-devel/2015-September/030267.html
for background.
- Signed-off-by: Werner Koch <wk@gnupg.org>