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

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



Change-Id: I2bf15b371952a4197bb86b161810e5bfa80c06da
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>