[gnome-builder] workbench: fix includes to be relative

[Christian Hergert <chergert src gnome org>]

commit c125f11d6be4facf19cc2ebd533b94b76e941f83
Author: Christian Hergert <chergert redhat com>
Date:   Fri Jul 14 15:46:23 2017 -0700

    workbench: fix includes to be relative

 libide/workbench/ide-workbench-addin.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/libide/workbench/ide-workbench-addin.c b/libide/workbench/ide-workbench-addin.c
index 246375b..1280ec6 100644
--- a/libide/workbench/ide-workbench-addin.c
+++ b/libide/workbench/ide-workbench-addin.c
@@ -18,7 +18,8 @@
 
 #define G_LOG_DOMAIN "ide-workbench-addin"
 
-#include "ide-workbench-addin.h"
+#include "workbench/ide-workbench-addin.h"
+#include "workbench/ide-workbench-private.h"
 
 G_DEFINE_INTERFACE (IdeWorkbenchAddin, ide_workbench_addin, G_TYPE_OBJECT)