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

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

Change-Id: I1275ea9b91676fc58839e821d25c193ed40cad96
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>