git: openjdk/jdk: 8271242: Add Arena regression tests

[Thomas Stuefe]

Changeset: cd7e30ef
Author:    Thomas Stuefe <stuefe at openjdk.org>
Date:      2021-07-30 16:42:40 +0000
URL:       https://git.openjdk.java.net/jdk/commit/cd7e30ef84165722c2128471231b6000b1c46fb8

8271242: Add Arena regression tests

Reviewed-by: mseledtsov, coleenp

! test/hotspot/gtest/memory/test_arena.cpp
+ test/hotspot/gtest/testutils.cpp
+ test/hotspot/gtest/testutils.hpp
+ test/hotspot/jtreg/gtest/ArenaGtests.java