fix(swingset): add 'slogFile' option to buildVatController()

This was available on the "real" `makeSwingsetController()` API, but not the
`buildVatController` convenience API, which is still in use by a number of
unit tests.

packages/SwingSet/src/controller.js

@@ -408,6 +408,7 @@ export async function makeSwingsetController(
  *   testTrackDecref?: unknown,
  *   snapstorePath?: string,
  *   warehousePolicy?: { maxVatsOnline?: number },
+ *   slogFile?: string,
  * }} runtimeOptions
  * @typedef { import('@agoric/swing-store-simple').KVStore } KVStore
  */
@@ -424,13 +425,15 @@ export async function buildVatController(
     slogCallbacks,
     snapstorePath,
     warehousePolicy,
+    slogFile,
   } = runtimeOptions;
   const actualRuntimeOptions = {
     verbose,
     debugPrefix,
     slogCallbacks,
     snapstorePath,
     warehousePolicy,
+    slogFile,
   };
   const initializationOptions = { verbose, kernelBundles };
   let bootstrapResult;