hg: jdk/sandbox: 8233712: Limit default tests jobs based on ulimit -u setting

[chris.hegarty at oracle.com]

Changeset: fc68b2cdfeeb
Author:    sgehwolf
Date:      2019-11-06 18:06 +0100
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/fc68b2cdfeeb

8233712: Limit default tests jobs based on ulimit -u setting
Reviewed-by: erikj, ihse

! make/RunTests.gmk
! make/RunTestsPrebuiltSpec.gmk
! make/autoconf/basics.m4
! make/autoconf/spec.gmk.in