hg: panama/dev: Automatic merge with foreign

[maurizio.cimadamore at oracle.com]

Changeset: ba86d01c81c1
Author:    mcimadamore
Date:      2018-09-14 18:50 +0200
URL:       http://hg.openjdk.java.net/panama/dev/rev/ba86d01c81c1

Automatic merge with foreign

- src/java.base/share/classes/jdk/internal/foreign/UpcallStub.java