[gnome-builder] autotools: add source tag to aide in debugging

[Christian Hergert <chergert src gnome org>]

commit 2f7adf8194afe4173a3164d56d6febd8c93e9a73
Author: Christian Hergert <chergert redhat com>
Date:   Thu Sep 15 11:34:38 2016 -0700

    autotools: add source tag to aide in debugging

 plugins/autotools/ide-autotools-build-system.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/plugins/autotools/ide-autotools-build-system.c b/plugins/autotools/ide-autotools-build-system.c
index c7d87e5..6b9e284 100644
--- a/plugins/autotools/ide-autotools-build-system.c
+++ b/plugins/autotools/ide-autotools-build-system.c
@@ -1034,6 +1034,7 @@ ide_autotools_build_system_tags_build_async (IdeTagsBuilder      *builder,
   configuration = ide_configuration_manager_get_current (config_manager);
 
   task = g_task_new (self, cancellable, callback, user_data);
+  g_task_set_source_tag (task, ide_autotools_build_system_tags_build_async);
   simple_make_command (file_or_directory, "ctags", task, configuration);
 }