am d0a44722: add LOCAL_PREBUILT_STRIP_COMMENTS to clear_vars.mk

Merge commit 'd0a44722be82319e45b6616267011d4dd17e767b'

* commit 'd0a44722be82319e45b6616267011d4dd17e767b':
  add LOCAL_PREBUILT_STRIP_COMMENTS to clear_vars.mk