rclone: add librclone to passthru.tests

pkgs/applications/networking/sync/rclone/default.nix

@@ -1,6 +1,7 @@
 { lib, stdenv, buildGoModule, fetchFromGitHub, buildPackages, installShellFiles, fetchpatch
 , makeWrapper
 , enableCmount ? true, fuse, macfuse-stubs
+, librclone
 }:
 
 buildGoModule rec {
@@ -58,6 +59,10 @@ buildGoModule rec {
         --prefix LD_LIBRARY_PATH : "${fuse}/lib"
     '';
 
+  passthru.tests = {
+    inherit librclone;
+  };
+
   meta = with lib; {
     description = "Command line program to sync files and directories to and from major cloud storage";
     homepage = "https://rclone.org";