After the recent libgpg-error update, the workaround for gpgrt-config
is no more necessary.

Reverts 63481e619 ("libassuan: fix linking of host's libgpg-error").

Signed-off-by: Alexander Egorenkov <egorenar-dev@posteo.net>

gpgrt-config is trying to use the host's /usr/lib path when looking for
libgpg-error. Therefore, disable it and gpg-error-config will be used
as a fallback.

Signed-off-by: Alexander Egorenkov <egorenar-dev@posteo.net>

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

Signed-off-by: Daniel Golle <daniel@makrotopia.org>