am 8a0a5274: Add stack unwinding directives to atomic-android-arm.S.

Merge commit '8a0a5274ff37cbf3acad0199735a05e5fe3b5c9d' into eclair-mr2-plus-aosp

* commit '8a0a5274ff37cbf3acad0199735a05e5fe3b5c9d':
  Add stack unwinding directives to atomic-android-arm.S.