hg: jdk9/dev: 8035825: Warn instead of fail when calling the configure wrapper directly

[magnus.ihse.bursie at oracle.com]

Changeset: e7872d8abd12
Author:    ihse
Date:      2014-02-27 09:17 +0100
URL:       http://hg.openjdk.java.net/jdk9/dev/rev/e7872d8abd12

8035825: Warn instead of fail when calling the configure wrapper directly
Reviewed-by: dholmes, tbell

! common/autoconf/configure
! common/autoconf/configure.ac
! common/autoconf/generated-configure.sh