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

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



Change-Id: Id8c9e861d44084c0a71dd8259a33497571e14a13
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>