hg: openjfx/8/graphics/rt: Gradle: add .gradle directories to .hgignore

[hang . vo]

Changeset: f6b05e9c2b72
Author:    kcr
Date:      2013-06-10 08:58 -0700
URL:       http://hg.openjdk.java.net/openjfx/8/graphics/rt/rev/f6b05e9c2b72

Gradle: add .gradle directories to .hgignore

! .hgignore