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/i386/syntax.h

@@ -1,6 +1,6 @@
 /* syntax.h -- Definitions for x86 syntax variations.
  *
- *       Copyright (C) 1992, 1994, 1995, 1998,
+ *       Copyright (C) 1992, 1994, 1995, 1998, 
  *                     2001, 2002 Free Software Foundation, Inc.
  *
  * This file is part of Libgcrypt.
@@ -16,8 +16,8 @@
  * 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
  *
  * Note: This code is heavily based on the GNU MP Library.
  *	 Actually it's the same code with only minor changes in the
@@ -26,6 +26,12 @@
  *	 to avoid revealing of sensitive data due to paging etc.
  */
 
+#include <config.h>
+
+#ifdef __i386__
+#include "asm-common-i386.h"
+#endif
+
 #undef ALIGN
 
 #if defined (BSD_SYNTAX) || defined (ELF_SYNTAX)
@@ -66,3 +72,7 @@
 #undef ALIGN
 #define ALIGN(log) .align log,0x90
 #endif
+
+/* 'ret' instruction replacement for straight-line speculation mitigation */
+#define ret_spec_stop \
+	ret; int3;