Merge "Also build the compile-time tests with _FORTIFY_SOURCE=3." into main am: 93698e3b8d

Original change: https://android-review.googlesource.com/c/platform/bionic/+/3539500

Change-Id: I0edc423952ea0b63f357c620a32bed0c7dda966c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>