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

[musl] / src / stdio / fscanf.c

#include <stdio.h>
#include <stdarg.h>

int fscanf(FILE *f, const char *fmt, ...)
{
        int ret;
        va_list ap;
        va_start(ap, fmt);
        ret = vfscanf(f, fmt, ap);
        va_end(ap);
        return ret;
}