Merge "SystemClock: elapsedRealtimeNano() should use clock_gettime() on Linux" am: e3ff256228 am: 6d28bd81f5
am: 1e18e78601

* commit '1e18e78601b8ffd3e51f172ec3ed44640a4f4ff5':
  SystemClock: elapsedRealtimeNano() should use clock_gettime() on Linux

Change-Id: If8d414f9dbfbd799fa5b1baf673cdbfd422896a3