fix missing EXIT_* in stdlib.h after header cleanup

include/stdlib.h

@@ -69,6 +69,9 @@ int wctomb (char *, wchar_t);
 size_t mbstowcs (wchar_t *, const char *, size_t);
 size_t wcstombs (char *, const wchar_t *, size_t);
 
+#define EXIT_FAILURE 1
+#define EXIT_SUCCESS 0
+
 #define MB_CUR_MAX 4
 
 #define RAND_MAX (0x7fffffff)
@@ -81,9 +84,6 @@ size_t wcstombs (char *, const wchar_t *, size_t);
 #include <bits/wexitstatus.h>
 #endif
 
-#define EXIT_FAILURE 1
-#define EXIT_SUCCESS 0
-
 int posix_memalign (void **, size_t, size_t);
 int setenv (const char *, const char *, int);
 int unsetenv (const char *);