Update prebuilt emulator binaries.
am: 8a4758b098

Change-Id: Ifbafd5065eea2e32ec0f73a1172d074ccabad272
tree: 4faedacf87b7435fa83503a8040d977a832f2032
  1. darwin-x86_64/
  2. linux-x86_64/
  3. .gitignore
  4. NOTICE
  5. README