hg: openjfx/10-dev/rt: 8178075: Provide generic add-exports mechanism

[david.hill at oracle.com]

Changeset: 834498972ddf
Author:    ddhill
Date:      2017-04-05 18:51 -0400
URL:       http://hg.openjdk.java.net/openjfx/10-dev/rt/rev/834498972ddf

8178075: Provide generic add-exports mechanism
Reviewed-by: kcr, jgiles

! build.gradle
+ buildSrc/addExports