fix label loading in arm

was still loading the integer address
instead of the return address's address
Hello World working

test/elf/test_hello.rb

@@ -12,7 +12,7 @@ class HelloTest < MiniTest::Test
   end
 
   def test_string_put
-    @input = "return 'Hello'.putstring"
+    @input = "return 'Hello World!\n'.putstring"
     check
   end
 end