hg: panama/dev: Automatic merge with foreign

[maurizio.cimadamore at oracle.com]

Changeset: 3da824f8275f
Author:    mcimadamore
Date:      2018-12-19 17:44 +0100
URL:       http://hg.openjdk.java.net/panama/dev/rev/3da824f8275f

Automatic merge with foreign

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