Add llvm role

roles/llvm/tasks/Ubuntu-18.04.yaml

@@ -19,15 +19,7 @@
   set_fact:
     lib_dir: '{{release.name | lower | regex_replace(" (\d+)\.\d+\.\d+", "-\1")}}'
 
-- name: create temporary directory for download
+# - name: download release archive
-  tempfile:
+#   get_url:
-    state: directory
+#     url: '{{asset.browser_download_url}}'
-  register: tempdir
+#     dest: 
-
-- set_fact:
-    download_path: '{{tempdir.path}}/llvm.tar.xz'
-
-- name: download release archive
-  get_url:
-    url: '{{asset.browser_download_url}}'
-    dest: '{{download_path}}'