Merge "Enable LTO for riscv64" am: e5dc6158 am: 1b65e2c1 am: ce141b04 am: 43df246c

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2591987



Change-Id: I7f5469039be0dad1e730351e87aecd5fbe7ae6c7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>