Update prebuilt clang version
am: 3e4bb413d4

Change-Id: Icf30c322da335850ebda62bee07fc3491b6b90a1
tree: 403330d1c85d76bd564f94c2da0d768238452283
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh
  4. manifest.xml