* tools/Makefile.am (gpgconf-w32): New target. Builds gpgconf with
subsystem windows.
* build-aux/speedo/w32/wixlib.wxs: Package it.
--
This allows us to create scripts that call gpgconf without opening
a console. Using subsystem windows is better then to just close
the console after start as it avoids the console flashing up.
(cherry picked from commit c366e04958481382c3f7b50f169120053186069b)
e2659f4bf6