add configuration value for VCL OpenGL backend

Change-Id: Ie23e31bec68e6f5ae3aab6ff5d6f19df5c2c9242

officecfg/registry/schema/org/openoffice/Office/Common.xcs

@@ -847,6 +847,18 @@
     </group>
   </templates>
   <component>
+    <group oor:name="VCL">
+      <info>
+        <desc>Contains settings for VCL.</desc>
+      </info>
+      <prop oor:name="UseOpenGL" oor:type="xs:boolean" oor:nillable="false">
+        <info>
+           <desc>Specifies if OpenGL rendering should be used in VCL backends
+                supporting it.</desc>
+        </info>
+        <value>false</value>
+      </prop>
+    </group>
     <group oor:name="InternalMSExport">
       <info>
         <desc>Contains internal MSExport settings that are common for all