hg: build-infra/jdk8: * Update/improve configure option help texts.

[magnus.ihse.bursie at oracle.com]

Changeset: bb876fc5bcdb
Author:    ihse
Date:      2012-10-24 21:34 +0200
URL:       http://hg.openjdk.java.net/build-infra/jdk8/rev/bb876fc5bcdb

* Update/improve configure option help texts.
* Remove unused/irrelevant configure options. (enable-jigsaw, disable-nimbus, list-builddeps)
* Move --enable-jfr to closed sources.
* Rewrite logic for with-openjdk-only to clarify operation and improve output

! common/autoconf/basics.m4
! common/autoconf/build-performance.m4
! common/autoconf/builddeps.m4
! common/autoconf/generated-configure.sh
! common/autoconf/jdk-options.m4
! common/autoconf/spec.gmk.in
! common/autoconf/toolchain_windows.m4