Fix test runner for Android.

tools/testrunner/local/commands.py

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 113 matching lines @@
     try:
       os.unlink(name)
       return
     except OSError, e:
       retry_count += 1
       time.sleep(retry_count * 0.1)
   PrintError("os.unlink() " + str(e))
 
 
 def Execute(args, verbose=False, timeout=None):
+  args = [ c for c in args if c != "" ]
   (fd_out, outname) = tempfile.mkstemp()
   (fd_err, errname) = tempfile.mkstemp()
   try:
     (exit_code, timed_out) = RunProcess(
       verbose,
       timeout,
       args=args,
       stdout=fd_out,
       stderr=fd_err
     )
   except:
     raise
   os.close(fd_out)
   os.close(fd_err)
   out = file(outname).read()
   errors = file(errname).read()
   CheckedUnlink(outname)
   CheckedUnlink(errname)
   return output.Output(exit_code, timed_out, out, errors)