git: openjdk/jdk: 8264540: WhiteBox.metaspaceReserveAlignment should return shared region alignment

[Yumin Qi]

Changeset: d920f858
Author:    Yumin Qi <minqi at openjdk.org>
Date:      2021-04-05 18:31:12 +0000
URL:       https://git.openjdk.java.net/jdk/commit/d920f858

8264540: WhiteBox.metaspaceReserveAlignment should return shared region alignment

Reviewed-by: ccheung, iklam

! src/hotspot/share/prims/whitebox.cpp
! test/hotspot/jtreg/runtime/cds/SpaceUtilizationCheck.java
! test/hotspot/jtreg/runtime/cds/appcds/SharedArchiveConsistency.java
! test/hotspot/jtreg/runtime/cds/appcds/SharedRegionAlignmentTest.java
! test/lib/sun/hotspot/WhiteBox.java