Revert "Handle Clang's change of defaults from -fcommon to -fno-common" am:...

Revert "Handle Clang's change of defaults from -fcommon to -fno-common" am: 4e0f6451 am: e380846f am: 77b54026 am: 7c9d4a78

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2706193



Change-Id: I80cab13bff36d2cd548b5cf670b0221f06357a24
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>