Re-enable LTO for linux-kselftest am: 5d9d3fcd36 am: 2091471b13

Original change: https://android-review.googlesource.com/c/platform/external/linux-kselftest/+/2853675

Change-Id: I1687f82faff7f7b11079416157d06159c29874c3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>