Make config.h inclusion consistent

Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
Reviewed-by: Derek Foreman <derekf@osg.samsung.com>
diff --git a/clients/simple-dmabuf-v4l.c b/clients/simple-dmabuf-v4l.c
index a73556c..7ee5cce 100644
--- a/clients/simple-dmabuf-v4l.c
+++ b/clients/simple-dmabuf-v4l.c
@@ -20,7 +20,7 @@
  * OF THIS SOFTWARE.
  */
 
-#include <config.h>
+#include "config.h"
 
 #include <stdio.h>
 #include <stdlib.h>