Make compiler/debug/ symbols hidden. am: 79c4f832be am: f406305c7b

Original change: https://android-review.googlesource.com/c/platform/art/+/2303002

Change-Id: I63b73184cda2d213418d3115ba31f36783d54420
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>