osx.cfg in google-api-client-0.32.0

- old
+ new

@@ -1,3 +1,8 @@
 # Format: //devtools/kokoro/config/proto/build.proto
 
+env_vars: {
+    key: "OS"
+    value: "osx"
+}
+
 build_file: "google-api-ruby-client/.kokoro/osx.sh"
\ No newline at end of file