hg: jdk8u/jdk8u-dev: 8078437: Enable use of devkits for Windows

[kevin.walls at oracle.com]

Changeset: 20daa32eec6f
Author:    kevinw
Date:      2018-05-21 06:54 -0700
URL:       http://hg.openjdk.java.net/jdk8u/jdk8u-dev/rev/20daa32eec6f

8078437: Enable use of devkits for Windows
Reviewed-by: erikj, ihse

! common/autoconf/basics.m4
! common/autoconf/basics_windows.m4
! common/autoconf/generated-configure.sh
! common/autoconf/toolchain.m4
! common/autoconf/toolchain_windows.m4