[WIP]: fixed install-root cleanup in system/repo.yml

Need to check why binary cache for binutils are there

Author: itsManjeet

elements/system/repo.yml

@@ -18,7 +18,7 @@ initial-commands: |-
     rm ${app}.zsync
   done
 
-  rmdir /install-root
+  rm -rf /install-root
 
   # TODO: should be enabled via systemd user-preset
   systemctl enable --global appimaged.service
@@ -62,4 +62,4 @@ include-parts:
 
 build-depends:
   - components/ostree.yml
-  - system/ostree-config.yml
+  - system/ostree-config.yml