clean_junk: to take care of artifacts while building kernels

Signed-off-by: Simarpreet Singh <simar@linux.com>
clean-junk: rename

Signed-off-by: Simarpreet Singh <simar@linux.com>
Merge branch 'master' of github.com:simar7/kernel-tools

Signed-off-by: Simarpreet Singh <simar@linux.com>