test: test "current" agoric-sdk with "current" endo master

Author: erights

packages/SwingSet/test/upgrade/test-upgrade.js

@@ -120,6 +120,8 @@ const initKernelForTest = async (t, bundleData, config, options = {}) => {
   };
 };
 
+// Gratuitous change so I can create an otherwise identical PR
+
 const testNullUpgrade = async (t, defaultManagerType) => {
   const config = makeConfigFromPaths('../bootstrap-relay.js', {
     defaultManagerType,