hg: build-infra/jdk8: * Add support for closed-spec.gmk.

[magnus.ihse.bursie at oracle.com]

Changeset: 43099bbc35a1
Author:    ihse
Date:      2012-06-13 11:25 +0200
URL:       http://hg.openjdk.java.net/build-infra/jdk8/rev/43099bbc35a1

* Add support for closed-spec.gmk.
* Move flag --with-sflt-lib-path to closed where it belongs.
* Fix X detection.

! common/autoconf/generated-configure.sh
! common/autoconf/libraries.m4
! common/autoconf/spec.gmk.in
! common/autoconf/toolchain.m4