[gnome-builder] git: add note about requirements to run test

[Christian Hergert <chergert src gnome org>]

commit 36ace83a4ce08cc515f1e05a3435e07bee9446cc
Author: Christian Hergert <chergert redhat com>
Date:   Thu May 6 12:54:46 2021 -0700

    git: add note about requirements to run test

 src/plugins/git/daemon/test-git.c | 5 +++++
 1 file changed, 5 insertions(+)
---
diff --git a/src/plugins/git/daemon/test-git.c b/src/plugins/git/daemon/test-git.c
index 60a79f41b..455a54d2d 100644
--- a/src/plugins/git/daemon/test-git.c
+++ b/src/plugins/git/daemon/test-git.c
@@ -76,7 +76,12 @@ do_test_config (IpcGitConfig *config)
     {
       g_autofree gchar *value = NULL;
 
+      g_message ("  Looking up key: %s", keys[i]);
       ret = ipc_git_config_call_read_key_sync (config, keys[i], &value, NULL, &error);
+
+      if (error && strcmp (keys[i], "user.signingkey") == 0)
+        g_error ("This test requires that you set user.signingkey for the user account");
+
       g_assert_no_error (error);
       g_assert_true (ret);