Add .clang-format to hidl-gen.
am: 59b579e0a3

Change-Id: I867ef72ec8eda09f7d9735efc5b49eddc2dbd781
tree: 869b51eb28bce9db0dff256e26d434f635a9014f
  1. .clang-format
  2. PREUPLOAD.cfg
  3. update-makefiles.sh