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/Spy.js

@@ -7,7 +7,10 @@ getJasmineRequireObj().Spy = function(j$) {
     };
   })();
 
-  var matchersUtil = new j$.MatchersUtil();
+  var matchersUtil = new j$.MatchersUtil({
+    customTesters: [],
+    pp: j$.makePrettyPrinter()
+  });
 
   /**
    * _Note:_ Do not construct this directly, use {@link spyOn}, {@link spyOnProperty}, {@link jasmine.createSpy}, or {@link jasmine.createSpyObj}