lxd/migrate: Debugf() --> LogDebugf()
lxd/migrate: Debugf() --> LogDebugf()

Signed-off-by: Christian Brauner <48455ab3070520a2d174545c7239d6d0fabd9a83@canonical.com>

erikmack/lxd,atxwebs/lxd,stgraber/lxd,lxc/lxd,stgraber/lxd,akshaykarle/lxd,jsavikko/lxd,lxc/lxd,hallyn/lxd,Skarlso/lxd,atxwebs/lxd,stgraber/lxd,akshaykarle/lxd,akshaykarle/lxd,chrisglass/lxd,lxc/lxd,pcdummy/lxd,stgraber/lxd,chrisglass/lxd,mjeanson/lxd,jsavikko/lxd,hallyn/lxd,georghopp/lxd,ollie314/lxd,mjeanson/lxd,lxc/lxd,stgraber/lxd,erikmack/lxd,jsavikko/lxd,lxc/lxd,lxc/lxd,georghopp/lxd,lxc/lxd,mjeanson/lxd,techtonik/lxd,atxwebs/lxd,Skarlso/lxd,techtonik/lxd,atxwebs/lxd,pcdummy/lxd,hallyn/lxd,hallyn/lxd,techtonik/lxd,ollie314/lxd,stgraber/lxd,ollie314/lxd,hallyn/lxd,pcdummy/lxd,chrisglass/lxd,georghopp/lxd,Skarlso/lxd,erikmack/lxd,stgraber/lxd,hallyn/lxd,Skarlso/lxd