[aarch64-port-dev ] [15] RFR(T) 8243008: Shenandoah: TestVolatilesShenandoah test failed on aarch64

[Zhengyu Gu]

compiler/c2/aarch64/TestVolatilesShenandoah.java test failed on aarch64, 
because Shenandoah no long has traversal mode, but new 
incremental-update mode.

Bug: https://bugs.openjdk.java.net/browse/JDK-8243008
Webrev: http://cr.openjdk.java.net/~zgu/JDK-8243008/webrev.00/

Thanks,

-Zhengyu