Moved contents of clang_cflags into cflags am: ce5443941a am: 1f6fb5b29e am: bbd893d527 am: 197b459f07

Original change: https://android-review.googlesource.com/c/platform/external/google-breakpad/+/2069495

Change-Id: Ib74e6bf03cc03b2512851c4d31d8dc4f6bcf7be8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>