llvm-git: update to current master
MesaLib-git: update to current master
libclc-git: update to current master
xf86-video-ati: merge "radeon: enable hawaii accel conditionally (v3)" from master

Only if the kernel has the new CP firmware (available from linux3.17 package)
Merge pull request #507 from RealJohnGalt/llvm

Various git updates + hawaii accel