hg: openjfx/8u-dev/rt: 8164497: Update .hgignore files to ingore .jcheck dir until we actually enable jcheck

[kevin.rushforth at oracle.com]

Changeset: 69e3673e0da7
Author:    kcr
Date:      2016-08-19 10:39 -0700
URL:       http://hg.openjdk.java.net/openjfx/8u-dev/rt/rev/69e3673e0da7

8164497: Update .hgignore files to ingore .jcheck dir until we actually enable jcheck
Reviewed-by: ddhill

! .hgignore