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/README.GIT

@@ -0,0 +1,49 @@
+If you are building from GIT, run the script
+
+./autogen.sh
+
+first, to make sure that you have all the necessary maintainer tools
+are installed and to build the actual configuration files.  If you
+have just checked out from GIT, you should add the option "--force" to
+autogen.sh so that meta data is noticed by autom4te.cache.  Then run
+
+./configure --enable-maintainer-mode
+
+followed by the usual make.
+
+If autogen.sh complains about insufficient versions of the required
+tools, or the tools are not installed, you may use environment
+variables to override the default tool names:
+
+ AUTOMAKE_SUFFIX  is used as a suffix for all tools from the automake
+                  package.  For example
+                     AUTOMAKE_SUFFIX="-1.7" ./autogen.sh
+                  uses "automake-1.7" and "aclocal-1.7.
+ AUTOMAKE_PREFIX  is used as a prefix for all tools from the automake
+                  page and may be combined with AUTOMAKE_SUFFIX. e.g.:
+                    AUTOMAKE_PREFIX=/usr/foo/bin ./autogen.sh
+                  uses "automake" and "aclocal" in the /usr/foo/bin
+                  directory.
+ AUTOCONF_SUFFIX  is used as a suffix for all tools from the automake
+                  package
+ AUTOCONF_PREFIX  is used as a prefix for all tools from the automake
+                  package
+ GETTEXT_SUFFIX   is used as a suffix for all tools from the gettext
+                  package
+ GETTEXT_PREFIX   is used as a prefix for all tools from the gettext
+                  package
+
+It is also possible to use the variable name AUTOMAKE, AUTOCONF,
+ACLOCAL, AUTOHEADER, GETTEXT and MSGMERGE to directly specify the name
+of the programs to run.  It is however better to use the suffix and
+prefix forms as described above because that does not require
+knowledge about the actual tools used by autogen.sh.
+
+
+Please don't use autopoint, libtoolize or autoreconf unless you are
+the current maintainer and want to update the standard configuration
+files.  All those files should be in GIT and only updated manually
+if the maintainer decides that newer versions are required.  The
+maintainer should also make sure that the required version of automake
+et al. are properly indicated at the top of configure.ac and take care
+to copy the files and not merely use symlinks.