Merge "riscv64: use `tail` for tail calls." am: 6cb7db2b03

Original change: https://android-review.googlesource.com/c/platform/bionic/+/2477975

Change-Id: I7a2a5a4f275ae5f769c1c2bd066376b67e31dac5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>