The ccache build requires xxhash, which is download from
the Internet. So add host-build package for xxhash.
Fixes: #16851
Signed-off-by: Chukun Pan <amadeus@jmu.edu.cn>
[ use git source proto ]
Link: https://github.com/openwrt/openwrt/pull/17700
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
