Bump debian/compat to 10 and adjust Build-Depends on debhelper accordingly
-rw-r--r-- 832 Makefile
drwxr-xr-x - debian
drwxr-xr-x - etc
-rwxr-xr-x 8453 grml-x
-rw-r--r-- 3873 grml-x.txt
drwxr-xr-x - usr_share_grml