hg: amber/amber: Fix ofConstant extractor factory

[brian.goetz at oracle.com]

Changeset: 7d26530a0558
Author:    briangoetz
Date:      2018-11-01 12:33 -0400
URL:       http://hg.openjdk.java.net/amber/amber/rev/7d26530a0558

Fix ofConstant extractor factory

! src/java.base/share/classes/java/lang/compiler/Extractor.java
! test/jdk/java/lang/compiler/ExtractorTest.java
! test/jdk/java/lang/compiler/RecordTest.java