hg: jdk9/sandbox: Break out version handling into separate autoconf file.

[magnus.ihse.bursie at oracle.com]

Changeset: 364177f1af0a
Author:    ihse
Date:      2015-02-11 14:09 +0100
URL:       http://hg.openjdk.java.net/jdk9/sandbox/rev/364177f1af0a

Break out version handling into separate autoconf file.

! common/autoconf/configure.ac
! common/autoconf/generated-configure.sh
! common/autoconf/jdk-options.m4
+ common/autoconf/jdk-version.m4