Update ngClick.js

In our code we have an input element inside a label. The click on the label
generates two clicks, but the second click was not recognised by angular-touch
as a label click, because it only looks at the current element, instead of
looking for a label in parent elements. Therefore, the second click gets
busted, and clicking on the label doesn't do anything for 2500ms.

I added the additional lookup for a containing label inside one of the
conditions inside the onClick method.

Closes angular#11577

src/ngTouch/directive/ngClick.js

@@ -144,7 +144,7 @@ ngTouch.directive('ngClick', ['$parse', '$timeout', '$rootElement',
       lastLabelClickCoordinates = null;
     }
     // remember label click coordinates to prevent click busting of trigger click event on input
-    if (nodeName_(event.target) === 'label') {
+    if (findUpLabel(event.target)) {
       lastLabelClickCoordinates = [x, y];
     }
 
@@ -163,6 +163,12 @@ ngTouch.directive('ngClick', ['$parse', '$timeout', '$rootElement',
     event.target && event.target.blur && event.target.blur();
   }
 
+  function findUpLabel(el) {
+  	while (el) {
+      if (nodeName_(el) === 'label') return true;
+  		el = el.parentNode;
+  	}
+  }
 
   // Global touchstart handler that creates an allowable region for a click event.
   // This allowable region can be removed by preventGhostClick if we want to bust it.