Make debian package builder more robust in uninstall step

tools/bots/linux_distribution_support.py

 #!/usr/bin/python
 
 # Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 """
 Buildbot steps for src tarball generation and debian package generation
 
 Package up the src of the dart repo and create a debian package.
@@ skipping 111 matching lines @@
     print 'Building src tarball'
     Run([sys.executable, './tools/create_tarball.py',
          '--tar_filename', tarfile])
 
     print 'Building Debian packages'
     Run([sys.executable, './tools/create_debian_packages.py',
          '--tar_filename', tarfile,
          '--out_dir', builddir])
 
   with bot.BuildStep('Sanity check installation'):
-    if os.path.exists('/usr/bin/dart'):
+    if os.path.exists('/usr/bin/dart') or os.path.exists(
+        '/usr/lib/dart/bin/dart2js'):
       print "Dart already installed, removing"
       UninstallDart()
     TestInstallation(assume_installed=False)
 
     InstallFromDep(builddir)
     TestInstallation(assume_installed=True)
 
     # We build the runtime target to get everything we need to test the
     # standalone target.
     Run([sys.executable, './tools/build.py', '-mrelease', '-ax64', 'runtime'])
@@ skipping 22 matching lines @@
     bot_name, _ = bot.GetBotName()
     channel = bot_utils.GetChannelFromName(bot_name)
     if channel != bot_utils.Channel.BLEEDING_EDGE:
      ArchiveArtifacts(tarfile, builddir, channel)
     else:
       print 'Not uploading artifacts on bleeding edge'
 
 if __name__ == '__main__':
   # We pass in None for build_step to avoid building the sdk.
   bot.RunBot(SrcConfig, SrcSteps, build_step=None)