[aarch64-port-dev ] Reproducers for server compiler errors

[Andy Johnson]

hotspot/test/compiler/6340864/TestByteVect.java
hotspot/test/compiler/6340864/TestShortVect.java
hotspot/test/compiler/8001183/TestCharVect.java

All of these are in the openjdk source repository.

ARRLEN is set to 997, but for TestCharVect.java, it will continue to fail
until ARRLEN is less than 120.
ITERS is set to 11000, but this is just used for the timing portion of the
test.  It can be reduced to a smaller value so that the test doesn't take
as long to run.  It has no impact on the Verification portion of the test.
If Verification fails, the timing portion isn't run anyway.  However, ITERS
also impacts how long the Warmup section runs, so reducing it gets you to
the Verification section quicker.

-AndyJ