utils: add missing global.h include

Make sure that utils.{c,h} have access to the necessary defines created
during the configure stage when building xfstests.

Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Signed-off-by: Zorro Lang <zlang@kernel.org>
diff --git a/src/vfs/utils.h b/src/vfs/utils.h
index c102464..e32865a 100644
--- a/src/vfs/utils.h
+++ b/src/vfs/utils.h
@@ -3,6 +3,8 @@
 #ifndef __IDMAP_UTILS_H
 #define __IDMAP_UTILS_H
 
+#include "../global.h"
+
 #ifndef _GNU_SOURCE
 #define _GNU_SOURCE
 #endif