Merge "Build LLVM components for musl from source" am: 1c351b7e8d

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

Change-Id: I79d3c836699092fae136ba80607b2423fcc2b032
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>