Simplifies standalone VM Android build.

tools/gyp/find_mac_gcc_version.py

 #!/usr/bin/env python
 # Copyright (c) 2013, 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.
 
 import re
 import subprocess
 import sys
 
 def main():
@@ skipping 17 matching lines @@
     elif (major == 4 and minor >= 5) or major == 5:
       # XCode seems to select the specific clang version automatically
       return 'com.apple.compilers.llvm.clang.1_0'
     else:
       raise Exception('Unknown XCode Version "%s"' % stdout)
   else:
     raise Exception('Could not parse output of xcodebuild "%s"' % stdout)
 
 if __name__ == '__main__':
   if sys.platform != 'darwin':
-    raise Exception("This script only runs on Mac")
-  print main()
+    #raise Exception("This script only runs on Mac")
+    # If we aren't on Mac, print out a dummy version string; it won't be used.
+    print 'X.X'
+  else:
+    print main()