cc/gcc: backport upstream patches for GCC bug 54369

See http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54369 for more information
This bug has a serious effect on Linux/MIPS and SPARC kernel builds.

Add the fix for these versions of gcc: 4.6.0, 4.6.2, 4.6.3, and 4.7.0.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

 # m68k specific configuration file

 ## depends on EXPERIMENTAL

 ##

 ## select ARCH_SUPPORTS_32

 ## select ARCH_DEFAULT_32

 ## select ARCH_DEFAULT_BE

 ## select ARCH_SUPPORTS_WITH_CPU

 ##

 ## help The m68k architecture