gnupg: Extend -native wrapper to fix gpgme-native's gpgconf problems

gnupg: Extend -native wrapper to fix gpgme-native's gpgconf problems

The gpg commit signing in ostree-native doesn't work properly when
running from sstate.  The ostree-native is linked with gpgme-native's
libraries, which have calls into gpg.

Ultimately it turned out the problem was that gpgme calls gpgconf and
some of the other gnupg-native binaries directly.  Not all the
binaries have a wrapper which sets the environment variable GNUPG_BIN.
Without this wrapper these binaries it gets the path assignment from
the original compilation which causes a fault when running from sstate
in a new tmp directory because these paths will not exist.

(From OE-Core rev: f93bf3bd051923618ce3949d5686fdb8cf998645)

Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>