O_DIRECTORY is only available if _GNU_SOURCE is defined

https://github.com/linux-test-project/ltp/pull/58

Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>

diff -Nur ltp-full-20160126.orig/testcases/kernel/syscalls/fanotify/fanotify01.c ltp-full-20160126/testcases/kernel/syscalls/fanotify/fanotify01.c
--- ltp-full-20160126.orig/testcases/kernel/syscalls/fanotify/fanotify01.c	2016-01-26 13:35:25.000000000 +0100
+++ ltp-full-20160126/testcases/kernel/syscalls/fanotify/fanotify01.c	2016-03-05 00:55:02.977264913 +0100
@@ -25,6 +25,7 @@
  * DESCRIPTION
  *     Check that fanotify work for a file
  */
+#define _GNU_SOURCE
 #include "config.h"
 
 #include <stdio.h>
diff -Nur ltp-full-20160126.orig/testcases/kernel/syscalls/fanotify/fanotify02.c ltp-full-20160126/testcases/kernel/syscalls/fanotify/fanotify02.c
--- ltp-full-20160126.orig/testcases/kernel/syscalls/fanotify/fanotify02.c	2016-01-26 13:35:25.000000000 +0100
+++ ltp-full-20160126/testcases/kernel/syscalls/fanotify/fanotify02.c	2016-03-05 00:54:44.600558612 +0100
@@ -25,6 +25,7 @@
  * DESCRIPTION
  *     Check that fanotify work for children of a directory
  */
+#define _GNU_SOURCE
 #include "config.h"
 
 #include <stdio.h>
diff -Nur ltp-full-20160126.orig/testcases/kernel/syscalls/fanotify/fanotify03.c ltp-full-20160126/testcases/kernel/syscalls/fanotify/fanotify03.c
--- ltp-full-20160126.orig/testcases/kernel/syscalls/fanotify/fanotify03.c	2016-01-26 13:35:25.000000000 +0100
+++ ltp-full-20160126/testcases/kernel/syscalls/fanotify/fanotify03.c	2016-03-05 00:55:13.917685403 +0100
@@ -25,6 +25,7 @@
  * DESCRIPTION
  *     Check that fanotify permission events work
  */
+#define _GNU_SOURCE
 #include "config.h"
 
 #include <stdio.h>
diff -Nur ltp-full-20160126.orig/testcases/kernel/syscalls/fanotify/fanotify04.c ltp-full-20160126/testcases/kernel/syscalls/fanotify/fanotify04.c
--- ltp-full-20160126.orig/testcases/kernel/syscalls/fanotify/fanotify04.c	2016-01-26 13:35:25.000000000 +0100
+++ ltp-full-20160126/testcases/kernel/syscalls/fanotify/fanotify04.c	2016-03-05 00:55:24.530093286 +0100
@@ -25,6 +25,8 @@
  * DESCRIPTION
  *     Check various fanotify special flags
  */
+
+#define _GNU_SOURCE
 #include "config.h"
 
 #include <stdio.h>