dkms remove --all issue

won't notice some leftover folders and thus will keep old module version lingering
by module I mean something like acpu_call or vboxhost
not like a kernel module
a hack to make dkms remove --all work as expected

when upgrading module vboxhost from 4.3.12 to 4.3.14
this would work, while previously it didn't
previously it would fail to dkms autoinstall or status