Somewhere else in SproutCore defines String.prototype.loc in a way th…

…at doesn't work for apps. Previously it was overwritten but my patch (having SC.String be "supplemented in" rather than mixed in) changed that. This restores String.prototype.loc to previous functionality.

frameworks/foundation/mixins/string.js

@@ -347,6 +347,9 @@ SC.String.strip = SC.String.trim; // convenience alias.
 // Apply SC.String mixin to built-in String object
 SC.supplement(String.prototype, SC.String) ;
 
+/** @private */
+String.prototype.loc = SC.String.loc; // Two places define it, and we want the version at SC.String.loc
+
 /** @private */
 SC.String.fmt = String.prototype.fmt; // copy from runtime