7018387: Xrender pipeline may leak GC's

Reviewed-by: prr

src/solaris/classes/sun/java2d/xr/XRSurfaceData.java

@@ -479,8 +479,7 @@ public abstract class XRSurfaceData extends XSurfaceData {
         if (xrpipe == null) {
             try {
                 SunToolkit.awtLock();
-                xgc = renderQueue.createGC(xid); // TODO: GC leak? where to
-                // clean up?
+                xgc = XCreateGC(getNativeOps());
 
                 xrpipe = new XRRenderer(maskBuffer.getMaskBuffer());
                 xrtxpipe = new PixelToShapeConverter(xrpipe);