LLVM tools: Unittests for get_llvm_hash.py

BUG=None
TEST='./get_llvm_hash_unittest.py' passes

Change-Id: I421e58dda744c6df6ae37a2fbc6559b98bcab2a8
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/toolchain-utils/+/1687777
Reviewed-by: George Burgess <gbiv@chromium.org>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Tested-by: Salud Lemus <saludlemus@google.com>
2 files changed