hg: bsd-port/jdk9: Back port BSD support from the initial BSD port.

[glewis at eyesbeyond.com]

Changeset: c5e686bd5a48
Author:    Greg Lewis <glewis at eyesbeyond.com>
Date:      2017-10-08 09:41 -0700
URL:       http://hg.openjdk.java.net/bsd-port/jdk9/rev/c5e686bd5a48

Back port BSD support from the initial BSD port.

Note that generated-configure.sh was auto-generated.

This gets the configure step to succeed.

! common/autoconf/boot-jdk.m4
! common/autoconf/build-performance.m4
! common/autoconf/flags.m4
! common/autoconf/generated-configure.sh
! common/autoconf/help.m4
! common/autoconf/jdk-options.m4
! common/autoconf/libraries.m4
! common/autoconf/platform.m4
! common/autoconf/toolchain.m4