Merge "riscv64 SCS support." am: 060cd2438c

Original change: https://android-review.googlesource.com/c/platform/bionic/+/2427910

Change-Id: Ice51f7ba02dad339357f3e036fed203f987d08f2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>