[vector] Replace IllegalArgumentE with UnsupportedOE for zero arg methods

[Paul Sandoz]

Hi,

Please review the following change replacing IllegalArgumentException with UnsupportedOperationException for some methods that accept zero args:

  http://cr.openjdk.java.net/~psandoz/panama/vector-ise-to-uoe/webrev/ <http://cr.openjdk.java.net/~psandoz/panama/vector-ise-to-uoe/webrev/>

This change is in response to reviews in preparation for integration into jdk/jdk.

Paul.