Revert "Add option to flag 4.8 builds for devices that do not support 4.9 yet"

This reverts commit 8564f75e33a87038c8c356d2c8fbc8dc5d2c2897.
Revert "Allow building with SaberMod/Linaro Toolchains"

This reverts commit 71a92a60a0d0bf6703ad6dae64cbeeb279c47c44.