hg: openjfx/9-dev/rt: 8179454: Build FX docs for HTML 5

[kevin.rushforth at oracle.com]

Changeset: 93b4e859536e
Author:    kcr
Date:      2017-04-28 15:19 -0700
URL:       http://hg.openjdk.java.net/openjfx/9-dev/rt/rev/93b4e859536e

8179454: Build FX docs for HTML 5
Reviewed-by: ddhill

! build.gradle