Z:englobe-dpkg-man--a646bd-The DEB HOST ARCH CPU and DEB /hu

The DEB_HOST_ARCH_CPU and DEB_HOST_ARCH_OS variables were only introduced in relatively recent versions of B (since dpkg 1.13.2), before this I files tended to check the values of the DEB_HOST_GNU_CPU or DEB_HOST_GNU_TYPE variables which have been subject to change.