hg: build-infra/jdk8: Cleaned up HOST_... variables.

[fredrik.ohrstrom at oracle.com]

Changeset: 3cff9abff4aa
Author:    ohrstrom
Date:      2012-03-28 12:37 +0200
URL:       http://hg.openjdk.java.net/build-infra/jdk8/rev/3cff9abff4aa

Cleaned up HOST_... variables.

! common/autoconf/configure
! common/autoconf/configure.ac
! common/autoconf/platform.m4
! common/autoconf/spec.gmk.in
! common/makefiles/NativeCompilation.gmk