x64: rename to native to not conflict with the x64 comptime variable

examples/native/hello_world.v

@@ -0,0 +1,20 @@
+// fn println(s string) { }
+
+// 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++
+	}
+	/*
+	println('Hello again!')
+	//test_fn()
+	println('done')
+	*/
+}