GnuPG needs to be built before GPGME to prevent an error
in the Ruby gpgme gem:
ArgumentError (released ctx):
gpgme (1.0.8) lib/gpgme.rb:967:in `gpgme_set_armor'
gpgme (1.0.8) lib/gpgme.rb:967:in `armor='
Signed-off-by: Adam Vandenberg <flangy@gmail.com>