[OE-core] gcc 4.7 + mips64 architecture support

[Khem Raj]

Hello

Now that release is almost out of door. I would like some eyes on the
gcc-4.7 work
and mips64 architecture support that I have done meanwhile

I have made sure that gcc-4.6 still keeps working and I have patches
for gcc-4.5 too
for meta-oe too. I have repeatedly built core-image-sato and
core-image-minimal for uclibc/eglibc
but more coverage would be nicer.

The patches are posted here

http://git.openembedded.org/openembedded-core-contrib/log/?h=kraj/misc

I would appreciate any feedback or testing on this

Thanks
-Khem