Dont use ctype.h from str.h

mongoose.h

@@ -539,8 +539,7 @@ static __inline struct tm *localtime_r(time_t *t, struct tm *tm) {
 #endif
 
 
-#include <ctype.h>
-#include <string.h>
+
 
 struct mg_str {
   const char *ptr;  // Pointer to string data

src/str.h

@@ -1,7 +1,6 @@
 #pragma once
 
-#include <ctype.h>
-#include <string.h>
+#include "arch.h"
 
 struct mg_str {
   const char *ptr;  // Pointer to string data

test/mongoose_custom.h

@@ -3,6 +3,7 @@
 
 #define _POSIX_TIMERS
 
+#include <ctype.h>
 #include <errno.h>
 #include <stdarg.h>
 #include <stdbool.h>