Merge change 1018 into donut

* changes:
  If no battery stats are found, return status_unknown
tree: fd60fb886045a715ba88f0b3dcf3f367fb8ceb6e
  1. awt/
  2. camera/
  3. cmds/
  4. im/
  5. include/
  6. libs/
  7. opengl/
  8. MODULE_LICENSE_APACHE2
  9. NOTICE