Fix panics in art build code when target arch is riscv64 am: 0b325abb39 am: 46e36ba9a1

Original change: https://android-review.googlesource.com/c/platform/art/+/2239704

Change-Id: I48dc7643c8f30921a44611ab9e315670d850ab66
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>