am 6a494915: Merge "Allow NULL in pthread_mutex_lock/unlock."

* commit '6a494915d795d4f1c4d27aab3da0b65e7e4c0b18':
  Allow NULL in pthread_mutex_lock/unlock.
This commit is contained in:
Christopher Ferris 2015-06-10 20:36:49 +00:00 committed by Android Git Automerger
commit 8cba773269

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