hg: jdk9/sandbox/jdk: Merge

[magnus.ihse.bursie at oracle.com]

Changeset: a98194b7be2c
Author:    ihse
Date:      2017-05-17 11:04 +0200
URL:       http://hg.openjdk.java.net/jdk9/sandbox/jdk/rev/a98194b7be2c

Merge

! make/CompileTools.gmk
- src/java.base/share/specs/serialization/changelog.md
- src/java.base/share/specs/serialization/images/class.gif