hg: amber/amber: Add pattern simulation scaffolding

[brian.goetz at oracle.com]

Changeset: 4b1e008bd652
Author:    briangoetz
Date:      2018-04-04 13:44 -0400
URL:       http://hg.openjdk.java.net/amber/amber/rev/4b1e008bd652

Add pattern simulation scaffolding

! src/java.base/share/classes/java/lang/compiler/Extractor.java
! src/java.base/share/classes/java/lang/compiler/ExtractorCarriers.java < src/java.base/share/classes/java/lang/compiler/PatternCarriers.java
+ src/java.base/share/classes/java/lang/compiler/PatternSim.java
+ src/java.base/share/classes/java/lang/compiler/_pattern.java