hg: jdk/sandbox: Cleanup leftover custom stuff, include custom at the end.

[magnus.ihse.bursie at oracle.com]

Changeset: ff90766e3c60
Author:    ihse
Date:      2017-11-27 14:24 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/ff90766e3c60

Cleanup leftover custom stuff, include custom at the end.

! make/RunTestsPrebuilt.gmk
! make/RunTestsPrebuiltSpec.gmk