hg: openjfx/8/controls/rt: Update to workaround for RT-28435, workaround was hurting performance of non-rounded region backgrounds on Modena.

[hang.vo at oracle.com]

Changeset: 472e658ac370
Author:    "Jasper Potts"
Date:      2013-04-19 11:28 -0700
URL:       http://hg.openjdk.java.net/openjfx/8/controls/rt/rev/472e658ac370

Update to workaround for RT-28435, workaround was hurting performance of non-rounded region backgrounds on Modena.

! javafx-sg-prism/src/com/sun/javafx/sg/prism/NGRegion.java