hg: jdk/sandbox: Merge from default

[erik.joelsson at oracle.com]

Changeset: 031640f92352
Author:    erikj
Date:      2019-01-02 10:21 +0100
URL:       http://hg.openjdk.java.net/jdk/sandbox/rev/031640f92352

Merge from default

! make/autoconf/basics.m4
! make/autoconf/spec.gmk.in
- src/hotspot/share/runtime/arguments_ext.hpp
- src/hotspot/share/services/diagnosticCommand_ext.hpp
- test/langtools/jdk/javadoc/doclet/lib/JavadocTester.java