RFR(XXXS): 8005772: Bad compile ID in phase events

[Nils Eliasson]

Please review this change:

Webrev: http://cr.openjdk.java.net/~neliasso/8005772/webrev.01/
Bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=8005772

This change makes stub-compilation report 0 as compile ID. The rationale 
is to reserve -1 for uninitialized or bad values and 0 for places where 
the compile id is unavailable. All valid compile IDs begin at 1.

Thanks,
Nils Eliasson