hg: shenandoah/jdk: Critical native tests should only be ran on x86_64 platforms

[zgu at redhat.com]

Changeset: 2c7675fb1dba
Author:    zgu
Date:      2018-05-04 12:38 -0400
URL:       http://hg.openjdk.java.net/shenandoah/jdk/rev/2c7675fb1dba

Critical native tests should only be ran on x86_64 platforms

! test/hotspot/jtreg/gc/shenandoah/CriticalNativeArgs.java
! test/hotspot/jtreg/gc/shenandoah/CriticalNativeStress.java