am 428a6d23: am f2521e76: Merge changes I46586cba,I6c500ab5,I2f7d9934

* commit '428a6d23fc71b1fe5c5e785905693b9d1c414958':
  Add mknod utility to system/core/toolbox
  Getevent: make sure the monotonic timestamp is displayed; warning cleanup.
  toolbox: Add nohup command