fix the type of wchar_t on arm; support wchar_t varying with arch

[musl] / src / misc / getdomainname.c

#include <unistd.h>
#include <sys/utsname.h>
#include <string.h>

int getdomainname(char *name, size_t len)
{
        *name = 0;
        return 0;
}