gcc: add patch with a workaround fixing the build on x86

Note:

http://gcc.gnu.org/PR52695

base/gcc/gcc47-libitm-pr52695-workaround.patch

@@ -0,0 +1,39 @@
+# --- SDE-COPYRIGHT-NOTE-BEGIN ---
+# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
+#
+# Filename: package/.../gcc/gcc47-libitm-pr52695-workaround.patch
+# Copyright (C) 2012 The OpenSDE Project
+#
+# More information can be found in the files COPYING and README.
+#
+# This patch file is dual-licensed. It is available under the license the
+# patched project is licensed under, as long as it is an OpenSource license
+# as defined at http://www.opensource.org/ (e.g. BSD, X11) or under the terms
+# of the GNU General Public License as published by the Free Software
+# Foundation; either version 2 of the License, or (at your option) any later
+# version.
+# --- SDE-COPYRIGHT-NOTE-END ---
+
+Description: Workaround to fix building on x86 systems
+
+http://gcc.gnu.org/PR52695
+
+--- a/libitm/config/x86/target.h
++++ b/libitm/config/x86/target.h
+@@ -69,16 +69,4 @@
+ } // namespace GTM
+ 
+ // We'll be using some of the cpu builtins, and their associated types.
+-#ifndef __cplusplus
+-/* ??? It's broken for C++. */
+ #include <x86intrin.h>
+-#else
+-# ifdef __SSE2__
+-#  include <emmintrin.h>
+-# elif defined(__SSE__)
+-#  include <xmmintrin.h>
+-# endif
+-# ifdef __AVX__
+-#  include <immintrin.h>
+-# endif
+-#endif