Android.bp: Move cflags repeated in each target to cc_defaults At the moment there are 24 such flags so Android.bp also gets reduced by a couple thousand lines. One of them is DCR_CLANG_REVISION which changes frequently and will now be a single-line change. Also add --output flag to the script, print() can be useful for quick debugging. Example diff (first few libs only) https://diff.googleplex.com/#key=eVUN8izqTcWe Bug: b/322338350 Change-Id: I21b987e3c7101c0bcbefa4a3b4ff30b1a4154ce4 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5236720 Commit-Queue: Roman Lavrov <romanl@google.com> Reviewed-by: Geoff Lang <geofflang@chromium.org>