This reverts commit c764f77dc1.
The commit caused warnings to be displayed at make defconfig etc.
WARNING: Makefile 'package/feeds/packages/python/python/Makefile'
has a host build dependency on 'zlib/host' but
'package/libs/zlib/Makefile' does not implement a 'host' build type
Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>