hg: build-infra/jdk8: Fixed configure on mac and changed some of the OPENJDK_BUILD_OS checks to

[erik.joelsson at oracle.com]

Changeset: ec787b0bac28
Author:    erikj
Date:      2012-09-27 11:43 +0200
URL:       http://hg.openjdk.java.net/build-infra/jdk8/rev/ec787b0bac28

Fixed configure on mac and changed some of the OPENJDK_BUILD_OS checks to
OPENJDK_TARGET_OS.

! common/autoconf/generated-configure.sh
! common/autoconf/toolchain.m4