Makefile: make sure manpages are built before install-man
Makefile: make sure manpages are built before install-man

Let install-man depend on man, so manpages are really built before
trying to install them.

Signed-off-by: Enrico Weigelt, metux IT consult <59bd0a3ff43b32849b319e645d4798d8a5d1e889@metux.net>

thaJeztah/containerd,containerd/containerd,thaJeztah/containerd,dmcgowan/containerd,vdemeester/containerd,containerd/containerd,dmcgowan/containerd,estesp/containerd,estesp/containerd,mikebrow/containerd,mikebrow/containerd,vdemeester/containerd