Add a C++ linting job via git-clang-format

Change-Id: Ia21fdbb236b6e8541ba58c5710cc5cfec62568ee
diff --git a/playbooks/clang-format/run.yaml b/playbooks/clang-format/run.yaml
new file mode 100644
index 0000000..006a0de
--- /dev/null
+++ b/playbooks/clang-format/run.yaml
@@ -0,0 +1,3 @@
+- hosts: all
+  roles:
+    - git-clang-format