hg: amber/amber: Automatic merge with default

[maurizio.cimadamore at oracle.com]

Changeset: 0c765fcd4d72
Author:    mcimadamore
Date:      2018-02-01 22:04 +0100
URL:       http://hg.openjdk.java.net/amber/amber/rev/0c765fcd4d72

Automatic merge with default

! make/autoconf/basics.m4
! make/autoconf/generated-configure.sh
! make/autoconf/help.m4
! make/autoconf/toolchain.m4
- make/devkit/createWindowsDevkit.sh
! src/jdk.compiler/share/classes/com/sun/tools/javac/code/Symbol.java