Merge "Support building libstagefright against musl" am: 5762c46787 am: fa2bdc7112 am: 7cd3ae84ac am: 6dc526e26a

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/1927575

Change-Id: I59888ba676571a5cb15869e8d5cc7fe2355504fa