configure.ac: search for both gpg2 and gpg

On some platforms the GnuPG binary is named 'gpg2' whereas others have 'gpg'.
This patch increases compatibility by searching for 'gpg' in addition to
'gpg2'.

Upstream-Status: Pending

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
---
 configure.ac | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 6746b4c..f6922ae 100644
--- a/configure.ac
+++ b/configure.ac
@@ -562,7 +562,7 @@ AC_PATH_PROG(__DIFF, diff, /bin/diff, $MYPATH)
 AC_PATH_PROG(__DITTO, ditto, %{_bindir}/ditto, $MYPATH)
 AC_PATH_PROG(__FILE, file, %{_bindir}/file, $MYPATH)
 AC_PATH_PROG(__GIT, git, %{_bindir}/git, $MYPATH)
-AC_PATH_PROG(__GPG, gpg2, %{_bindir}/gpg2, $MYPATH)
+AC_PATH_PROGS(__GPG, [gpg2 gpg], %{_bindir}/gpg2, $MYPATH)
 AC_PATH_PROG(__GSR, gsr, %{_bindir}/gsr, $MYPATH)
 AC_PATH_PROG(__GST_INSPECT, gst-inspect-0.10, %{_bindir}/gst-inspect-0.10, $MYPATH)
 AC_PATH_PROG(__GZIP, gzip, /bin/gzip, $MYPATH)
-- 
2.1.4