Add DEPS file

DEPS

@@ -0,0 +1,11 @@
+use_relative_paths = True
+
+vars = {
+  'pyyaml_version': '3.12',
+  'yaml_git':
+    'https://github.com/yaml',
+}
+
+deps = {
+  "vendor/pyyaml": (Var("yaml_git")) + '/pyyaml.git@' + (Var("pyyaml_version")),
+}