hg: amber/amber: Update specs as per Alex' comments

[brian.goetz at oracle.com]

Changeset: 3f0706d6e402
Author:    briangoetz
Date:      2018-03-05 17:41 -0500
URL:       http://hg.openjdk.java.net/amber/amber/rev/3f0706d6e402

Update specs as per Alex' comments

! src/java.base/share/classes/java/lang/sym/ClassRef.java
! src/java.base/share/classes/java/lang/sym/Constable.java
! src/java.base/share/classes/java/lang/sym/ConstantMethodHandleRef.java
! src/java.base/share/classes/java/lang/sym/ConstantRef.java
! src/java.base/share/classes/java/lang/sym/ConstantRefs.java
! src/java.base/share/classes/java/lang/sym/DynamicCallSiteRef.java
! src/java.base/share/classes/java/lang/sym/DynamicConstantRef.java
! src/java.base/share/classes/java/lang/sym/package-info.java