Add llvm role

roles/llvm/tasks/Ubuntu-18.04.yaml

@@ -28,11 +28,6 @@
     url: '{{asset.browser_download_url}}'
     dest: '{{archive_path}}'
 
-- name: create package directory
-  file:
-    path: '/usr/local/lib/{{package_name}}'
-    state: directory
-
 - name: extract release archive
   unarchive:
     src: '{{archive_path}}'