kernel toolchains: update 4.8.4 and 4.9.2 from @Christopher83

Change-Id: I7dd1439eb3adecbe5a3d3d875f8829a9fb727583
Signed-off-by: bart452 <bart4524@gmail.com>
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