am ac94fbd0: merge from open-source master

Merge commit 'ac94fbd081450ae7f208e4525b23b36d90d382e0'

* commit 'ac94fbd081450ae7f208e4525b23b36d90d382e0':
  Capture failure of copybit->stretch()
  Fix obvious typo bug in egl.cpp
  LocationManagerService: Fix race when removing LocationListener
  Don't return when blocking is true.
  Fix of compatibility with multifunction extUSB adapters.
  Fix documentation example, per issue 895 on android.googlecode.com