Don't restart the adb server in buildbot scripts.

That was a bad idea. There is something wrong when the server is restarted by
the buildslave, compared to manually in the console (even by the same user).


git-svn-id: http://address-sanitizer.googlecode.com/svn/trunk@2124 3c3640eb-14a6-2bb8-0b94-e9e73afe33f5