Revert " Switch to Linaro 4.8 toolchain"

This reverts commit e925750b1c224b2b9171a3fc48b5b28bebfe4db2.

Change-Id: I07dfab8b4bb46bad32628ef53d780d81f18a6a76
Signed-off-by: Josue Rivera <prbassplayer@gmail.com>