Merge "Reland^2 "Also build the compile-time tests with _FORTIFY_SOURCE=3."" into main am: 5e5c4cef28

Original change: https://android-review.googlesource.com/c/platform/bionic/+/3544720

Change-Id: I07f03bdd95bae04971f2d5c4f12a5a93e8a21fcf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>