Add web-ext-lint job

Change-Id: I12018ea457599ba0dd611c05464f3c1dd14d0fba
diff --git a/playbooks/web-ext-lint/run.yaml b/playbooks/web-ext-lint/run.yaml
new file mode 100644
index 0000000..40f022a
--- /dev/null
+++ b/playbooks/web-ext-lint/run.yaml
@@ -0,0 +1,4 @@
+- hosts: all
+  roles:
+    - revoke-sudo
+    - web-ext-lint