hg: jdk9/sandbox: 8176033: New cygwin grep does not match \r as newline

[chris.hegarty at oracle.com]

Changeset: 01d26dcf5eac
Author:    erikj
Date:      2017-03-01 21:28 +0100
URL:       http://hg.openjdk.java.net/jdk9/sandbox/rev/01d26dcf5eac

8176033: New cygwin grep does not match \r as newline
Reviewed-by: tbell, ihse

! common/autoconf/basics_windows.m4
! common/autoconf/generated-configure.sh