Use little_endian.h in libsys4

src/debugger_scm.c

@@ -23,6 +23,7 @@
 #include "system4/ain.h"
 #include "system4/file.h"
 #include "system4/instructions.h"
+#include "system4/little_endian.h"
 #include "system4/string.h"
 #include "system4/utfsjis.h"
 #include "vm.h"
@@ -30,7 +31,6 @@
 #include "vm/page.h"
 
 #include "debugger.h"
-#include "little_endian.h"
 
 struct variable {
 	enum ain_data_type data_type;