hg: openjfx/jfx-dev/rt: 8231310: Add .jcheck/conf to jfx git repo

[kevin.rushforth at oracle.com]

Changeset: 6744f504e684
Author:    kcr
Date:      2019-10-01 05:28 -0700
URL:       https://hg.openjdk.java.net/openjfx/jfx-dev/rt/rev/6744f504e684

8231310: Add .jcheck/conf to jfx git repo
Reviewed-by: prr, jvos

+ .jcheck/conf