After changes to default host build recipes
and default variable definitions,
several custom definitions can be removed,
and the gnulib recipes replaced
with hooks to common recipes.
Also remove leftover PKG_INSTALL
which has no effect for host builds.
Signed-off-by: Michael Pratt <mcpratt@pm.me>
Link: https://github.com/openwrt/openwrt/pull/15853
Signed-off-by: Robert Marko <robimarko@gmail.com>