hg: jdk9/hs/hotspot: 8159370: Add FlagGuard for easier modification of flags for unit tests

[erik.helin at oracle.com]

Changeset: 6643afe187ef
Author:    ehelin
Date:      2016-06-21 15:02 +0200
URL:       http://hg.openjdk.java.net/jdk9/hs/hotspot/rev/6643afe187ef

8159370: Add FlagGuard for easier modification of flags for unit tests
Reviewed-by: kbarrett, jwilhelm

! src/share/vm/runtime/globals.hpp
+ test/native/runtime/test_globals.cpp