Moved contents of clang_cflags into cflags am: 5cfa62ca29 am: 69aab83963 am: c62ec1000b am: 898868785e am: ba74d516e9

Original change: https://android-review.googlesource.com/c/platform/system/gatekeeper/+/2069578

Change-Id: Ia0631032b8a7911824767c65024a7f4db64ca114
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>