Merge "Add support for building llvm-rs-cc and bcc against musl" am: b7f7285e82 am: 184ff1e7bb am: c6a0a0c798 am: 80426eb010 am: 1308e83221

Original change: https://android-review.googlesource.com/c/platform/external/llvm/+/1813631

Change-Id: I75131b79e1c82fdac7bb84c973ecb23cda7e46c9