Add wrapper over GNU as

Since our GNU toolchain is too old to recognise newer archictures like
cortex-a55, add a wrapper to rewrite these architectures to a similar
older architecture.

Test: m checkbuild
Bug: 110235326
Change-Id: I4cf4eb2ef4326dcafdfd8799510523333eba2fd4
Merged-In: I4cf4eb2ef4326dcafdfd8799510523333eba2fd4
(cherry picked from commit 309aefd83c4adb20482e2863899914f47a31fe39)
2 files changed