3ds: 3ds port sources. First set of two

This commit adds changes to the original rockbox sources.

Note: the port files, functions, folders, etc., will be referred
to as 'ctru' to avoid using the Nintendo name elsewhere.

Change-Id: I0e2d3d4d2a75bd45ea67dc3452eb8d5487cf1f5a

firmware/include/_ansi.h

@@ -9,8 +9,8 @@
    "comment out" the non-ANSI parts of the ANSI header files (non-ANSI header
    files aren't affected).  */
 
-#ifndef _ANSIDECL_H_
-#define _ANSIDECL_H_
+#ifndef __ANSIDECL_H__
+#define __ANSIDECL_H__
 
 /* First try to figure out whether we really are in an ANSI C environment.  */
 /* FIXME: This probably needs some work.  Perhaps sys/config.h can be
@@ -64,4 +64,4 @@
 #endif
 #endif
 
-#endif /* _ANSIDECL_H_ */
+#endif /* __ANSIDECL_H__ */

firmware/include/dir.h

@@ -28,7 +28,9 @@
 #include "fs_attr.h"
 #include "fs_defines.h"
 
-#if defined (APPLICATION) || defined(CHECKWPS)
+#if defined(CTRU) && !defined(SIMULATOR)
+#include "filesystem-ctru.h"
+#elif defined (APPLICATION) || defined(CHECKWPS)
 #include "filesystem-app.h"
 #elif defined(SIMULATOR) || defined(DBTOOL)
 #include "../../uisimulator/common/filesystem-sim.h"

firmware/include/file.h

@@ -40,7 +40,9 @@ enum relate_result
     RELATE_PREFIX,        /* the path2 contains path1 as a prefix */
 };
 
-#if defined(APPLICATION) || defined(CHECKWPS)
+#if defined(CTRU) && !defined(SIMULATOR)
+#include "filesystem-ctru.h"
+#elif defined(APPLICATION) || defined(CHECKWPS)
 #include "filesystem-app.h"
 #elif defined(SIMULATOR) || defined(DBTOOL)
 #include "../../uisimulator/common/filesystem-sim.h"

firmware/include/rbendian.h

@@ -28,7 +28,7 @@
 #endif
 
 #ifndef __MINGW32__
-#ifdef __APPLE__
+#if defined(__APPLE__) || defined(CTRU)
 #include <sys/types.h>
 #else
 #include <endian.h>