track linaro 4.9

Suffice it to say I'm livid that after all of the crying about getting g2 onto the 4.4-based stuff, that its FUCKING boardconfig was set to use this kernel toolchain, while this commit collected dust in gerrit.
-NUKE

Change-Id: Iadcb30c8d7d941bd9c82c25bc3cbf6f673c72031