Update clang-tools to ab/6661405 am: ec7e496bac am: 0db5d9d0f4 am: 75439a9e6b am: f032c5df83 am: b1c46ae047 am: 39d090f1ea

Original change: https://android-review.googlesource.com/c/platform/prebuilts/clang-tools/+/1358042

Change-Id: I7f8c32717f7e7c13b41b3cbb3da3b75fc5849b4d
tree: 84266b6517128349e2e8f4c9e30cbf70f479ad61
  1. darwin-x86/
  2. linux-x86/
  3. build-prebuilts.sh
  4. manifest.xml