cc/gcc: add patch for 4.7.2

This patch fixes compilation of gcc when C++ is enabled and MMX is
available, but not SSE/SSE2/AVX.

Signed-off-by: Richard Braun <rbraun@sceen.net>
Message-Id: <20121126105642.GA12098@mail.sceen.net>
Patchwork-Id: 201648

 #!/bin/sh

 set -e

 printf "Running autoconf...\n"

 autoconf -Wall --force

 printf "Done. You may now run:\n    ./configure\n"