libgcrypt: upgrade from 1.4.5 to 1.4.6

This resolves the build issue on mips while compiling with gcc-4.5.0

Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>

diff --git a/meta/packages/libgcrypt/libgcrypt_1.4.5.bb b/meta/packages/libgcrypt/libgcrypt_1.4.6.bb
similarity index 100%
rename from meta/packages/libgcrypt/libgcrypt_1.4.5.bb
rename to meta/packages/libgcrypt/libgcrypt_1.4.6.bb