RFR: 8282024: add EscapeAnalysis statistics under PrintOptoStatistics [v15]

[aamarsh]

> Escape Analysis and Scalar Replacement statistics were added when the -XX:+PrintOptoStatistics flag is set. All code is placed in `#ifndef Product` block, so this code is only run when creating a debug build. Using renaissance benchmark I ran a few tests to confirm that numbers were printing correctly. Below is an example run:
> 
> 
> No escape = 263, Arg escape = 87, Global escape = 1628
> Objects scalar replaced = 193, Monitor objects removed = 32, GC barriers removed = 38, Memory barriers removed = 225

aamarsh has updated the pull request incrementally with two additional commits since the last revision:

 - delete iterative EA comment
 - account for iterative EA

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8019/files
  - new: https://git.openjdk.java.net/jdk/pull/8019/files/8c394555..fe3448eb

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8019&range=14
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8019&range=13-14

  Stats: 3 lines in 2 files changed: 0 ins; 1 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8019.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8019/head:pull/8019

PR: https://git.openjdk.java.net/jdk/pull/8019