hg: build-infra/jdk8: Handle the last of the "junk" in configure.ac. Clean up comments in

[magnus.ihse.bursie at oracle.com]

Changeset: f10299ef9610
Author:    ihse
Date:      2012-06-12 15:55 +0200
URL:       http://hg.openjdk.java.net/build-infra/jdk8/rev/f10299ef9610

Handle the last of the "junk" in configure.ac. Clean up comments in
configure.ac. Minor changes in macro order in configure.ac to improve
grouping.

! common/autoconf/configure.ac
! common/autoconf/generated-configure.sh
! common/autoconf/jdk-options.m4
! common/autoconf/libraries.m4
! common/autoconf/platform.m4
! common/autoconf/source-tree.m4
! common/autoconf/toolchain.m4