Filter -march and -mtune from Android 'cflags' and 'ldflags'
Filter -march and -mtune from Android 'cflags' and 'ldflags'

Fix removal of -mXXX flags from 'ldflags' on Android.bp backend.

Change-Id: I8e10973b5887753a6913442463fa555c7ccb5063
Signed-off-by: Sebastian Birunt <1263050fc3fa16b5af6da86b405f920b3d75697b@arm.com>

ARM-software/bob-build,ARM-software/bob-build,ARM-software/bob-build,ARM-software/bob-build,ARM-software/bob-build