RFR: Pick up remaining jdk/jdk11 changes

[Roman Kennke]

This picks up changes from jdk/jd11 into shenandoah/jdk11 up to:


changeset:   51384:3924d4cf8b41
user:        serb
date:        Thu Jul 05 21:29:11 2018 +0300
summary:     8205454: & is displayed in some Swing docs

List of changes:
http://cr.openjdk.java.net/~rkennke/jdk11-upstream-merge-2018-07-05/outgoing.txt

Merged with one trivial conflict.

Ok to push?

Roman