Fix build after removing a bunch of stuff.

rust/sys/victoriafalls/victoriafalls.yunq

@@ -0,0 +1,24 @@
+interface VFS {
+  method OpenFile(OpenFileRequest) -> (OpenFileResponse);
+  method GetDirectory(GetDirectoryRequest) -> (Directory);
+}
+
+message OpenFileRequest {
+  string path;
+}
+
+message OpenFileResponse {
+  string path;
+  u64 size;
+  capability memory;
+}
+
+message GetDirectoryRequest {
+  string path;
+}
+
+message Directory {
+  // , separated list of filenames until we have repeated strings.
+  string filenames;
+}
+