correct/convert some syntax to proper es6 syntax

Author: StrikeForceZero

app/js/services/cordova.js

@@ -4,9 +4,9 @@
 function CordovaService($document, $timeout, $window, $q) {
   'ngInject';
 
-  const defer = $q.defer();
+  const self = this;
 
-  let self = this;
+  const defer = $q.defer();
 
   self.ready = defer.promise;
 

gulp/tasks/browserify.js

@@ -41,7 +41,7 @@ function buildScript(file) {
   }
 
   function loadBrowserPlatform(){
-    var platformWWW = './platforms/browser/www/';
+    let platformWWW = './platforms/browser/www/';
 
     if(!fs.existsSync(platformWWW)){
       handleErrors('Browser platform not installed!!! Cordova will FAIL');