Don't capture the output of i18n command execution

i18n/execute.py

@@ -11,7 +11,7 @@ def execute(command, working_directory=BASE_DIR):
     Output is ignored.
     """
     LOG.info(command)
-    subprocess.check_output(command.split(' '), cwd=working_directory, stderr=subprocess.STDOUT)
+    subprocess.check_call(command, cwd=working_directory, stderr=sys.STDOUT, shell=True)
 
 
 def call(command, working_directory=BASE_DIR):