Update custom Linaro KERNEL_TOOLCHAIN's for 4.8 (4.8.4) & 4.9 (4.9.3)

from @Christopher83 11.25.14 & 11.26.14 build postings.

Change-Id: Iaa9ccc13cfcc0ebaa15dbeacca021035016a156e

It took me forever to push this change to my repo, and since it rarely gets updated, I figured it would be quicker and easier to pull here rather than pushing to Gerrit & then Gerrit to Github.