Fix panics in art build code when target arch is riscv64 am: 0b325abb39 am: 46e36ba9a1 am: 75afdf36a1

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

Change-Id: Ief4e16dab685b2804a4df4b701753ae8c9ed8793
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>