Update tests

Author: lucic71

tests/unit/out/unsafe/stdio.rs

@@ -175,6 +175,7 @@ pub unsafe fn test_fileno_3() {
         Box::from_raw(fp);
         0
     };
+    assert!(((((libc::unlink(file as *const i8)) == (0)) as i32) != 0));
 }
 pub fn main() {
     unsafe {

tests/unit/stdio.c

@@ -1,6 +1,7 @@
 // no-compile: refcount
 #include <assert.h>
 #include <stdio.h>
+#include <unistd.h>
 
 static void test_fputc(void) {
   fputc('H', stdout);