HSAIL store immediate webrev

[Eric Caspole]

Hi everyone,
I added storing immediates into the HSAIL assembler, see HSA PRM 0.95, 
pg 128. I just realized this had not been done before and I wanted to 
use it.

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

Thanks,
Eric