RFR (S): 8022456: LogCompilation tool does not work with C1 output again

[Vladimir Ivanov]

http://cr.openjdk.java.net/~vlivanov/8022456/webrev.01/
29 lines changed: 11 ins; 6 del; 12 mod;

LogCompilation tool erroneously expects "live" and "phase" attributes to 
be always present. It's correct for C2, but not for C1.
Fixed the problem by making them optional during parsing.

Also, added "phase" attribute to phase_done element to make the behavior 
consistent between C1/C2.

Testing: manual (parsed hotspot.log files from HS regression tests)

Thanks!

Best regards,
Vladimir Ivanov