RFR: Make Zero build and run with JDK8

[Roman Kennke]

Am Freitag, den 12.10.2012, 07:23 -0400 schrieb Coleen Phillmore:
> Hi,
> I looked at this briefly and it looks okay from the cpp interpreter 
> part.  Thank you for getting zero working again.   We tried to keep it 
> in sync with the permgen removal changes but didn't regularly test 
> this.   Hello world as a test for this is probably enough to verify your 
> changes to the non-JSR292 part.
> For JSR292 testing, you need to get a full jdk repository and go to the 
> jdk/test/java/lang/invoke and run the tests with jtreg.   How to run and 
> install jtreg is on the openjdk pages, and it's happily easy to do.

Yep, I did run these tests and they all pass, except CallSiteTest which
times out because Zero is too slow, but tweaking the test to do fewer
loops makes it pass as well.

Roman