RFR: 8293287 add ReplayReduce flag [v4]

[Dean Long]

> Add an experimental flag to help developers "reduce" a replay file.
> 
> As a first step, I plan to simulate reduced inlining. This will output multiple "compile" lines as if the first level of inlining never happened:
> A --> B --> C
> A --> D --> E
> becomes
> B --> C
> D --> E
> Developers can repeat iteratively until the replay crash no longer reproduces.

Dean Long has updated the pull request incrementally with one additional commit since the last revision:

  fix typo
  
  Co-authored-by: Tobias Hartmann <tobias.hartmann at oracle.com>

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/10134/files
  - new: https://git.openjdk.org/jdk/pull/10134/files/4ba53b45..d0340273

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10134&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10134&range=02-03

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/10134.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10134/head:pull/10134

PR: https://git.openjdk.org/jdk/pull/10134