fix test windows

Author: Eliyaan

vlib/v/gen/native/tests/string.vv

@@ -36,7 +36,14 @@ fn test_for_i_in_len() {
 }
 
 fn test_for_c_in_string() {
-	$if !windows {
+	$if windows {
+		println('0')
+		println('97')
+		println('1')
+		println('98')
+		println('2')
+		println('99')
+	} $else {
 		s := 'abc'
 		for i, c in s {
 			println(i)