Fix qtloader.js undefined variable error

Change-Id: I3fb0f6c334b7b3ce95a6de9879ce35ea0167f69d
Reviewed-by: Morten Johan Sørvig <morten.sorvig@theqtcompany.com>

src/tools/nacldeployqt/template_qtloader.cpp

@@ -150,7 +150,7 @@ function onProgress(event)
         console.log("progress " + event.loaded  + " " + event.total)
 
     if (event.total == 0) {
-        self.loadTextNode.innerHTML = loadText;
+        self.loadTextNode.innerHTML = self.loadText;
         return;
     }