new webrev for HSAILHotSpotLIRGenerator small fixes

[Caspole, Eric]

Hi everybody,
I put a new webrev here -

 http://cr.openjdk.java.net/~ecaspole/hsail_lir/webrev/

This fixes 2 issues I found while trying Clumatra: storing compressed constants was not implemented yet (thanks Tom D for this), and previously HSAILHotSpotLIRGenerator did not "implements HotSpotLIRGenerator" so some methods would fail to compile with ClassCastExceptions in the middle of compilation. I implemented dummy stubs for all that that throws NYI instead.
Regards,
Eric