RFR(M): 8166837: [TESTBUG] Fix tests on Linux/s390x

[Lindenmaier, Goetz]

Hi,

This change adapts the jtreg tests to work on S390.  Only compiler
tests had to be fixed.
Please review this change. I please need a sponsor.
http://cr.openjdk.java.net/~goetz/wr16/8166837-jtreg_fixes/hots-wr.01/
http://cr.openjdk.java.net/~goetz/wr16/8166837-jtreg_fixes/base-wr.01/

Base repository:
---------------------
Add isS390x() to platform.java. Sort checks alphabetically.
Add s390x to shouldSAAttach.

Hotspot repository:
-------------------------
compiler/ciReplay/SABase.java
SA writes "Command not valid until the attached to a VM" to test_replay.txt.
Disable test if SA not supported.

compiler/intrinsics/sha/cli/...
Add checks for corresponding cpu feature.

Adapt test_env.sh and TestMutuallyExclusivePlatformPredicates.java

Best regards,
  Goetz.

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/attachments/20161031/bca76b4a/attachment.html>