RFR (S) 8230238: Add another regression test for JDK-8134739

[Aleksey Shipilev]

RFE:
  https://bugs.openjdk.java.net/browse/JDK-8230238

8u fails without JDK-8134739 fix. Unfortunately, it does not reproduce on
compiler/loopopts/superword/TestVectorizationWithInvariant from there. It does, however, reproduce
on fuzzer tests that we luckily got (attached as 0021.tar.gz in JDK-8134739). We should really turn
that into proper additional regression test for JDK-8134739.

This would allow us to test 8u backports better. I am planning to backport it to 11u and 8u (where
it would expose the bug we want to fix).

jdk/jdk webrev:
  http://cr.openjdk.java.net/~shade/8230238/webrev.01/

Testing: new test with C1, C2, -Xcomp; the same in 8u (where it fails without 8134739, passes with
it); jdk-submit (running)

-- 
Thanks,
-Aleksey