Add PowerPC cross compiler & build script

See here for more info: http://www.gc-linux.org/wiki/Building_a_GameCube_Linux_Kernel_%28ARCH%3Dpowerpc%29
Update to 3.0.101 (EOL)

https://www.kernel.org/
Apply base mikep7-3.0.y-gc-wii kernel patch

Adds GameCube/Wii support
Add optional vfb-defio-gc-wii patch

See here for more info: http://fartersoft.com/blog/2011/07/31/hacking-up-an-rgb-framebuffer-driver-for-wii-linux-take-two
Add GC-Wii-Linux-Kernel-3.0.y README.md