am 3c60fb57: Update Darwin clang prebuilts after compiler-rt cherry-pick

* commit '3c60fb5744ce4fbde988fbc24e38a8d9e5a58e59':
  Update Darwin clang prebuilts after compiler-rt cherry-pick
tree: b1c45a1bf0099122228267999ca8c8eec6487a28
  1. bin/
  2. lib/
  3. lib64/
  4. update.sh