fix(build): closure build needs @ngInject to $mdUtil

Without this, closure compiler renaming breaks injection.

*  also needs @ngInject to $mdMedia
*  also needs @ngInject to core.js files.

Closes #7611. Closes #7609. Closes #7608.

Author: mhansen

src/core/core.js

@@ -17,6 +17,7 @@ angular
 /**
  * Detect if the ng-Touch module is also being used.
  * Warn if detected.
+ * @ngInject
  */
 function DetectNgTouch($log, $injector) {
   if ( $injector.has('$swipe') ) {
@@ -28,7 +29,9 @@ function DetectNgTouch($log, $injector) {
   }
 }
 
-
+/**
+ * @ngInject
+ */
 function MdCoreConfigure($provide, $mdThemingProvider) {
 
   $provide.decorator('$$rAF', ["$delegate", rAFDecorator]);
@@ -40,6 +43,9 @@ function MdCoreConfigure($provide, $mdThemingProvider) {
     .backgroundPalette('grey');
 }
 
+/**
+ * @ngInject
+ */
 function rAFDecorator($delegate) {
   /**
    * Use this to throttle events that come in often.

src/core/util/media.js

@@ -84,6 +84,7 @@ angular.module('material.core')
  *   $scope.anotherCustom = $mdMedia('max-width: 300px');
  * });
  * </hljs>
+ * @ngInject
  */
 
 function mdMediaFactory($mdConstant, $rootScope, $window) {

src/core/util/util.js

@@ -16,6 +16,9 @@ angular
   .module('material.core')
   .factory('$mdUtil', UtilFactory);
 
+/**
+ * @ngInject
+ */
 function UtilFactory($document, $timeout, $compile, $rootScope, $$mdAnimate, $interpolate, $log, $rootElement, $window) {
   // Setup some core variables for the processTemplate method
   var startSymbol = $interpolate.startSymbol(),