hg: openjfx/9-dev/rt: 8150260: make checkrepo executable bit optional

[david.hill at oracle.com]

Changeset: 4f3db97a36fd
Author:    ddhill
Date:      2016-02-19 11:55 -0500
URL:       http://hg.openjdk.java.net/openjfx/9-dev/rt/rev/4f3db97a36fd

8150260: make checkrepo executable bit optional
Reviewed-by: kcr

! build.gradle
! tools/scripts/checkWhiteSpace