[VectorAPI] Shift operations test coverage

[Paul Sandoz]

Some stuff is missing:

- Shift-op.template

- tests for arithmetic shift right with a vector (with and without a mask)

- tests for shifting by a constant and a mask

Paul.

> On Jun 5, 2018, at 1:09 PM, Halimi, Jean-Philippe <jean-philippe.halimi at intel.com> wrote:
> 
> Dear all,
> 
> I have added support for Shift operations test coverage in the VectorAPI test infrastructure.
> 
> Here is the webrev:
> http://cr.openjdk.java.net/~jphalimi/webrev_shiftTests_v1.0/
> 
> Please let me know your thoughts! :)
> 
> Jp