Bump Clang to clang-r407598b

clang-r407598b is the one currently used by AOSP:
https://android.googlesource.com/platform/prebuilts/clang/host/linux-x86/+/master/README.md

Tested locally and all tests pass.

Change-Id: I6a5e174481cf4e7f48b39d5200ccb696bbd3c507
1 file changed
tree: 07be5633c44aa28d2a74f68b8f7bec38741cb0b3
  1. aarch64/
  2. crosvm/
  3. cuttlefish/
  4. kvm-unit-tests/
  5. common.inc
  6. Makefile