RFR: Events

[Leonid Mesnik]

Events

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Commit messages:
 - jcheck fix
 - duplicated agent_common.h removed
 - ThreadStart/End added.
 - build issues fixed
 - lib names updated to don't match nsk names
 - events fixed.
 - Monitor events fixed.
 - MonitorEnter* tests fixed.
 - Merge branch 'fibers' of https://github.com/openjdk/loom into events
 - MonitorContendedEnter updated
 - ... and 11 more: https://git.openjdk.java.net/loom/compare/aa566add...3a205a12

Changes: https://git.openjdk.java.net/loom/pull/25/files
 Webrev: https://webrevs.openjdk.java.net/?repo=loom&pr=25&range=00
  Stats: 14462 lines in 79 files changed: 14349 ins; 111 del; 2 mod
  Patch: https://git.openjdk.java.net/loom/pull/25.diff
  Fetch: git fetch https://git.openjdk.java.net/loom pull/25/head:pull/25

PR: https://git.openjdk.java.net/loom/pull/25