Fixed GPLv2 license issue

Doing this from work via GitHub - Sorry for not combining with previous commits

src/citra_qt/qt-build.xml

@@ -1,4 +1,9 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+Copyright 2010 Daher Alfawares
+Licensed under GPLv2
+Refer to the license.txt file included.
+-->
 <ProjectSchemaDefinitions xmlns="clr-namespace:Microsoft.Build.Framework.XamlTypes;assembly=Microsoft.Build.Framework" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:sys="clr-namespace:System;assembly=mscorlib" xmlns:transformCallback="Microsoft.Cpp.Dev10.ConvertPropertyCallback" xmlns:impl="clr-namespace:Microsoft.VisualStudio.Project.Contracts.Implementation;assembly=Microsoft.VisualStudio.Project.Contracts.Implementation">
   <Rule
     Name="UIC"
@@ -483,4 +488,4 @@
     Name="QRC"
     DisplayName="Qt Resource Compiler"
     ItemType="QRC" />
-</ProjectSchemaDefinitions>
+</ProjectSchemaDefinitions>