[9] RFR (XXS): 8049529: LogCompilation: annotate make_not_compilable with compilation level

[Vladimir Ivanov]

http://cr.openjdk.java.net/~vlivanov/8049529/webrev.00/
https://bugs.openjdk.java.net/browse/JDK-8049529

It is useful to know at what level method compilation is disabled. Right 
now, this info isn't dumped to the log.

Before:
<make_not_compilable thread='...' method='...' bytes='...' count='...' 
backedge_count='...' iicount='...' stamp='...'/>
<make_not_osr_compilable thread='...' method='...' bytes='...' 
count='...' backedge_count='...' iicount='...' stamp='...'/>

After:
<make_not_compilable thread='...' osr='...' level='...' method='...' 
bytes='...' count='...' backedge_count='...' iicount='...' stamp='...'/>

No changes are needed in LogCompilation, since it doesn't care about 
make_not_{osr_}compilable tags now. I plan to address that in a separate 
change.

Testing: manual.

Thanks!

Best regards,
Vladimir Ivanov