hg: jdk/sandbox: 2 new changesets

[magnus.ihse.bursie at oracle.com]

Changeset: 298580086c9c
Author:    ihse
Date:      2017-11-30 16:16 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/298580086c9c

Replace : with / to better support all use cases.

! test/Makefile

Changeset: 76a784951142
Author:    ihse
Date:      2017-11-30 16:17 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/76a784951142

Use InitSupport.gmk. Better prebuilt variable info.

! make/RunTestsPrebuilt.gmk