Convert CommandObject constructors to StringRef.

llvm-svn: 283384
diff --git a/lldb/source/Commands/CommandObjectHelp.cpp b/lldb/source/Commands/CommandObjectHelp.cpp
index d03b5cd..1495e93 100644
--- a/lldb/source/Commands/CommandObjectHelp.cpp
+++ b/lldb/source/Commands/CommandObjectHelp.cpp
@@ -166,7 +166,7 @@
               m_interpreter.GetCommandPrefix(), sub_command.c_str());
           result.GetOutputStream().Printf(
               "\nThe closest match is '%s'. Help on it follows.\n\n",
-              sub_cmd_obj->GetCommandName());
+              sub_cmd_obj->GetCommandName().str().c_str());
         }
       }