Upgrade emulator to emu-master-dev build 3939570 am: 89fbf2893b am: e54ed348b8
am: a01daa9cab

Change-Id: Iee0d6cd07c432af96c88e75cb9fe9e9bc38a7b86
tree: 1194823829bb02a7946e246ad660ff5df6c0ca22
  1. darwin-x86_64/
  2. linux-x86_64/
  3. .gitignore
  4. NOTICE
  5. README
  6. update_emulator.sh