Bug 537873: Make --enable-methodjit-spew work in non-DEBUG code. r=brendan

This isn't strictly necessary for the bug, but it was handy in making sure
the patch hadn't affected SM's behavior.

js/src/jsopcode.cpp

@@ -118,7 +118,7 @@ static const char *CodeToken[] = {
 #undef OPDEF
 };
 
-#if defined(DEBUG) || defined(JS_JIT_SPEW)
+#if defined(DEBUG) || defined(JS_JIT_SPEW) || defined(JS_METHODJIT_SPEW)
 /*
  * Array of JS bytecode names used by DEBUG-only js_Disassemble and by
  * JIT debug spew.