CoreValidation: Fix Arm Compiler 6 linker warnings.
The compiler issues warning about unsupported (deprecated)
target architectures when called with specific -march.
-#! armclang -E --target=arm-arm-none-eabi -xc
+#! armclang -E --target=arm-arm-none-eabi -march=armv7-a -xc
;**************************************************
; Copyright (c) 2017 ARM Ltd. All rights reserved.
;**************************************************
