hg: panama/dev: Automatic merge with default

[maurizio.cimadamore at oracle.com]

Changeset: 2d161775b994
Author:    mcimadamore
Date:      2019-01-02 22:09 +0100
URL:       http://hg.openjdk.java.net/panama/dev/rev/2d161775b994

Automatic merge with default

! make/autoconf/basics.m4
! make/autoconf/spec.gmk.in
! src/java.base/share/classes/java/lang/ClassLoader.java