Add LICENSE, METADATA, MODULE_LICENSE_MIT and OWNERS files am: 2a73a26b03 am: db40004bd9 am: e7ce6e08fa

Original change: https://android-review.googlesource.com/c/platform/external/musl/+/1748945

Change-Id: I23ce6d8d6b8358ab77d412f7e6fab43ea096bd16