am 90186191: Merge "Don\'t set a pthread_t to NULL"

* commit '901861912ee63d9a0208ea9ecfc07931945d4743':
  Don't set a pthread_t to NULL
tree: 85ee24cff1a17cebae35acbac8c9c9420524a608
  1. halimpl/
  2. src/
  3. Android.mk
  4. CleanSpec.mk