Unbreak lldb invocations.

Author: jdm

python/servo/post_build_commands.py

@@ -162,8 +162,7 @@ def run(self, params, release=False, dev=False, android=None, debug=False, debug
                     command = rustCommand
 
             # Prepend the debugger args.
-            args = ([command] + self.debuggerInfo.args + ["--"]
-                    + args + params)
+            args = ([command] + self.debuggerInfo.args + args + params)
         else:
             args = args + params