CLANG_FORMAT_LOC
The path to the bin dir for LLVM can be used for both clang-cl.exe and
clang-format.exe. Changing this will reduce the amount of environment
variables in play, leading to better long term quality.
Done in batch script because Powershell requires execution policy to be
changed to run scripts. Therefore batch files are considered to have a
lower barrier for entry.
Vasily