lib/util: Clean up includes for xfile.[ch]

The include files added to xfile.h are already included
unconditionally elsewhere (replace.h, samba_util.h, ...) so Samba
can't be built without them.

To minimise dependencies, only include specific util headers instead
of samba_util.h.

Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Jeremy Allison <jra@samba.org>

lib/util/xfile.c

@@ -35,7 +35,8 @@
 
 #include "replace.h"
 #include "system/filesys.h"
-#include "lib/util/samba_util.h"
+#include "memory.h"
+#include "xfile.h"
 
 #define XBUFSIZE BUFSIZ
 

lib/util/xfile.h

@@ -19,6 +19,12 @@
 
 #ifndef _XFILE_H_
 #define _XFILE_H_
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <sys/stat.h>
+#include "attr.h"
+
 /*
   see xfile.c for explanations
 */