build-sys: fix clean rule removing tracked files
build-sys: fix clean rule removing tracked files

lucasdemarchi/kmod,pmmccorm/kmod,pmmccorm/kmod,Distrotech/kmod,lucasdemarchi/kmod,lpereira/kmod,pmmccorm/kmod,Distrotech/kmod,lpereira/kmod,lpereira/kmod,Distrotech/kmod,lucasdemarchi/kmod