Merge "riscv64: stop reserving x18 for shadow call stack." am: 0ee012c2 am:...

Merge "riscv64: stop reserving x18 for shadow call stack." am: 0ee012c2 am: 5823afea am: b373ca47 am: 0c5c1d86

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2534260



Change-Id: I3a5d4a90ec5d7aad4b5895c9a9adf3982b4eb561
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>