Fix typo in comments

defile => define

angularjs/angular.d.ts

@@ -582,7 +582,7 @@ declare module ng {
         cache?: any;
         withCredentials?: boolean;
 
-        // These accept multiple types, so let's defile them as any
+        // These accept multiple types, so let's define them as any
         data?: any;
         transformRequest?: any;
         transformResponse?: any;