native: implement for-c and for-in range loops (#12155)

examples/native/hello_world.v

@@ -1,20 +1,18 @@
-// fn println(s string) { }
-
-// fn test_fn() {
-// println('test fn')
-//}
+fn test_fn() {
+	println('test fn')
+}
 
 fn main() {
 	println('native test')
-	// i := 0
-	// for i < 5 {
-	for _ in 1 .. 5 {
-		println('Hello world from V native machine code generator!')
-		// i++
+	mut i := 0
+	for i < 5 {
+		println('Hello world from V native machine code generator, in a while style for loop!')
+		i++
+	}
+	for _ in 1 .. 5 {
+		println('Hello world from V native machine code generator, in a range loop!')
 	}
-	/*
 	println('Hello again!')
-	//test_fn()
+	test_fn()
 	println('done')
-	*/
 }