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>

# Compute M68k-specific values

CT_DoArchTupleValues() {

    :

}