hg: openjfx/8/graphics/rt: Removed stray references to libxml2 from build.gradle

[hang.vo at oracle.com]

Changeset: 1e133a8c7a60
Author:    peterz
Date:      2013-08-28 11:43 +0400
URL:       http://hg.openjdk.java.net/openjfx/8/graphics/rt/rev/1e133a8c7a60

Removed stray references to libxml2 from build.gradle

! build.gradle