hg: openjfx/9-dev/rt: 8169511: correct concatenation of dependencies/*/*.extra files

[david.hill at oracle.com]

Changeset: f213beedd572
Author:    ddhill
Date:      2016-11-10 09:31 -0500
URL:       http://hg.openjdk.java.net/openjfx/9-dev/rt/rev/f213beedd572

8169511: correct concatenation of dependencies/*/*.extra files
Reviewed-by: kcr

! build.gradle