hg: amber/amber: fix typo. add forgotten class.

[paul.sandoz at oracle.com]

Changeset: 63fa53424f91
Author:    psandoz
Date:      2017-10-26 09:04 -0700
URL:       http://hg.openjdk.java.net/amber/amber/rev/63fa53424f91

fix typo. add forgotten class.

! src/java.base/share/classes/java/lang/invoke/ClassRef.java
+ src/java.base/share/classes/java/lang/invoke/ConstantBootstraps.java