hg: jdk/sandbox: 8211727: Adjust default concurrency settings for running tests on Sparc

[chris.hegarty at oracle.com]

Changeset: 6b05634db714
Author:    erikj
Date:      2018-11-14 09:26 -0800
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/6b05634db714

8211727: Adjust default concurrency settings for running tests on Sparc
Reviewed-by: ctornqvi, tbell, mikael

! make/RunTests.gmk
! test/hotspot/jtreg/compiler/jsr292/ContinuousCallSiteTargetChange.java