am 54096df3: am 1f7c3cb3: am 061c758c: am 9fdf671d: Add LOCAL_ADDITIONAL_HTML_DIR to clear_vars for devsite docs builds.

# Via Android Git Automerger (3) and Dirk Dougherty (1)
* commit '54096df340b52254b8fe873d43f4de76806b788b':
  Add LOCAL_ADDITIONAL_HTML_DIR to clear_vars for devsite docs builds.