Add aarch64-linux-musl configurations for cpython3 am: 1dbd03f05a am: 8be82e547e am: 7859525491 am: 8d7c1e8d85

Original change: https://android-review.googlesource.com/c/platform/external/python/cpython3/+/2159818

Change-Id: I6527e566134c7b0ede156c4d0d3d0bd6d04861bd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>