hg: build-infra/jdk8: Added support for --disable-head and --disable-headless

[fredrik.ohrstrom at oracle.com]

Changeset: f475a921e902
Author:    ohrstrom
Date:      2012-02-14 12:07 +0100
URL:       http://hg.openjdk.java.net/build-infra/jdk8/rev/f475a921e902

Added support for --disable-head and --disable-headless
Building with --disable-head does not yet work, but the option is there.

! common/autoconf/configure
! common/autoconf/configure.ac
! common/autoconf/spec.gmk.in