Force 'bash' when starting emulator.

When invoking the emulator, we use a shell to allow full setup of the
runtime environment variables. We were using the default shell for the
account, which might be bash or sh, but the commands are bash specific.

Force the use of bash.

BUG=chromium:570810
TEST=bin/cbuildbot --nobootstrap --noreexec --buildbot
     --debug --buildroot ~/tmp/buildroot bbuildbot

Change-Id: I7fddcd03bb3d1f0489fa8a0b2e00c5d16b66a95b
1 file changed
tree: f6a60bf28a116e21d713fe267621d211263adba7
  1. .gitignore
  2. README.txt
  3. __init__.py
  4. builders/
  5. config_dump.json
  6. default.xml