libgcrypt: Import libgcrypt 1.11

We currently use an old version of libgcrypt which results in us having
fewer ciphers and missing on many other improvements.

Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>

grub-core/lib/libgcrypt/mpi/mpi-gcd.c

@@ -14,8 +14,8 @@
  * GNU Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ * License along with this program; if not, see <https://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  */
 
 #include <config.h>
@@ -28,7 +28,7 @@
  * Return: true if this 1, false in all other cases
  */
 int
-gcry_mpi_gcd( gcry_mpi_t g, gcry_mpi_t xa, gcry_mpi_t xb )
+_gcry_mpi_gcd (gcry_mpi_t g, gcry_mpi_t xa, gcry_mpi_t xb)
 {
     gcry_mpi_t a, b;
 
@@ -38,14 +38,15 @@ gcry_mpi_gcd( gcry_mpi_t g, gcry_mpi_t xa, gcry_mpi_t xb )
     /* TAOCP Vol II, 4.5.2, Algorithm A */
     a->sign = 0;
     b->sign = 0;
-    while( gcry_mpi_cmp_ui( b, 0 ) ) {
-	_gcry_mpi_fdiv_r( g, a, b ); /* g used as temorary variable */
+    while (mpi_cmp_ui (b, 0))
+      {
+	_gcry_mpi_fdiv_r( g, a, b ); /* G is used as temporary variable. */
 	mpi_set(a,b);
 	mpi_set(b,g);
-    }
+      }
     mpi_set(g, a);
 
     mpi_free(a);
     mpi_free(b);
-    return !gcry_mpi_cmp_ui( g, 1);
+    return !mpi_cmp_ui( g, 1);
 }