Merge "Build LLVM components for musl from source" am: 1c351b7e8d am: 2ed309c03e am: 010fb43ffe

Original change: https://android-review.googlesource.com/c/platform/external/llvm/+/2256268

Change-Id: I34ac3fee9da76a90081e536b17b8c791c28df506
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>