RFR(S) : 8011675: adding compilation level to replay data

[Igor Ignatyev]

Hi all,

Please review patch.

Problem:
Replay of compilations supports c1 and tiered as well as c2, the only 
thing missing is comp_level.

Fix:
1. added comp_level into dump and usage during replay
2. minor changes in agent/doc:
   - escaped '<', '>'
   - renamed 'C2 Replay'/'C2 compiler replay' to 'Replay'/'Compiler replay'

Testing:
manually launched the replay from JDK-8010934 (assert specifically to 
c1) on jvm w/o corresponded fix. assert was triggered w/ patch and 
wasn't triggered w/o.


webrev: http://cr.openjdk.java.net/~iignatyev/8011675/webrev.00/
jbs: https://jbs.oracle.com/bugs/browse/JDK-8011675
-- 
Best regards,
Igor Ignatyev