[gnome-builder] tests: Fix gnome-builder-plugins.h include

[Christian Hergert <chergert src gnome org>]

commit a3584f5b867596fbebea0d03cbf305e4f89fd107
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Mon Sep 25 18:19:59 2017 +0200

    tests: Fix gnome-builder-plugins.h include
    
    Introduced by 96cce33aaa5188996be8a5628a542f1f7bb5ec89

 src/tests/test-ide-buffer.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/tests/test-ide-buffer.c b/src/tests/test-ide-buffer.c
index ae85829..4beb7b6 100644
--- a/src/tests/test-ide-buffer.c
+++ b/src/tests/test-ide-buffer.c
@@ -23,7 +23,7 @@
 #include <ide.h>
 
 #include "application/ide-application-tests.h"
-#include "../src/plugins/gnome-builder-plugins.h"
+#include "../plugins/gnome-builder-plugins.h"
 
 static void
 test_buffer_basic_cb2 (GObject      *object,