find-version always assumes that gnupg is beta if autogen.sh is run
out of git-repo. This doesn't work for users whom just take release
tarball and re-run autoconf in their local build dir.
This fixes runtime issue:
$gpg --list-sigs
gpg: NOTE: THIS IS A DEVELOPMENT VERSION!
gpg: It is only intended for test purposes and should NOT be
gpg: used in a production environment or with production keys!
Signed-off-by: Wenzong Fan <wenzong.fan@windriver.com> Signed-off-by: Ross Burton <ross.burton@intel.com>