am 7a0f45b1: Forgot to update libc++ for new 3.6 prebuilts.

* commit '7a0f45b1ae96a8609df9eed01235e310137d6c8a':
  Forgot to update libc++ for new 3.6 prebuilts.
tree: 98ad8e9a5c5d724083f5b94d4d1d3cf8e97a4e13
  1. bin/
  2. lib/
  3. lib64/
  4. update.sh