Add DAC switcher script am: cab78e6e2b am: 8f0a01826f
am: 3e732660fe

Change-Id: Ia7d8ea0e6a0b9ad70133f7dd00df20902c3ee70b
tree: 77d416157907f1e3c035a79441dc8dd916bb3d8b
  1. switcher4.py