Correct placement of arguments and environment on stack.

int main(int argc, char *argv[])

style main function works now on Codezero/POSIX.

conts/posix/test0/include/posix_init.h

@@ -1,7 +1,6 @@
 #ifndef __LIBPOSIX_INIT_H__
 #define __LIBPOSIX_INIT_H__
 
-void libposix_init(void);
-void posix_service_init(void);
+int __libposix_init(void *envp);
 
 #endif /* __LIBPOSIX_INIT_H__ */