Inject a per-runable pretty printer into MatchersUtil

This will allow us to add support for custom object formatters, which
will be a per-runable resource like custom matchers, by injecting them
into the pretty-printer.

src/core/Expectation.js

@@ -141,7 +141,7 @@ getJasmineRequireObj().Expectation = function(j$) {
     args = args.slice();
     args.unshift(true);
     args.unshift(matcherName);
-    return util.buildFailureMessage.apply(null, args);
+    return util.buildFailureMessage.apply(util, args);
   }
 
   function negate(result) {