Reorder includes to fix travis build

lwext4/ext4.c

@@ -35,6 +35,7 @@
  */
 
 #include "ext4_config.h"
+#include "ext4.h"
 #include "ext4_blockdev.h"
 #include "ext4_types.h"
 #include "ext4_debug.h"
@@ -45,7 +46,7 @@
 #include "ext4_super.h"
 #include "ext4_dir_idx.h"
 #include "ext4_xattr.h"
-#include "ext4.h"
+
 
 #include <stdlib.h>
 #include <string.h>

lwext4/ext4.h

@@ -38,10 +38,6 @@
 #ifndef EXT4_H_
 #define EXT4_H_
 
-#include "ext4_config.h"
-#include "ext4_types.h"
-#include "ext4_blockdev.h"
-
 #include <stdint.h>
 #include <stddef.h>
 
@@ -96,6 +92,10 @@
  #include <fcntl.h>
 #endif
 
+#include "ext4_config.h"
+#include "ext4_types.h"
+#include "ext4_blockdev.h"
+
 /********************************OS LOCK INFERFACE***************************/
 
 /**@brief   OS dependent lock interface.*/