hg: build-infra/jdk8: Change --with-zlib default to always use bundled; only use system if

[magnus.ihse.bursie at oracle.com]

Changeset: 522e4e73cdee
Author:    ihse
Date:      2012-06-11 10:30 +0200
URL:       http://hg.openjdk.java.net/build-infra/jdk8/rev/522e4e73cdee

Change --with-zlib default to always use bundled; only use system if
explicitely told so.

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