Implemented data labels

examples/hello/hello.q

@@ -1,17 +1,11 @@
 main() {
-	x := f(1) + f(2) + f(3)
-
-	if x != 9 {
-		exit(1)
-	}
-
-	exit(0)
+	print("Hello", 5)
 }
 
-exit(code) {
-	syscall(60, code)
+print(address, length) {
+	write(1, address, length)
 }
 
-f(x) {
-	return x + 1
+write(fd, address, length) {
+	syscall(1, fd, address, length)
 }