Extend std::auto_ptr<> support to Ruby

This is trivial as exactly the same typemap as for Python can be used
for Ruby too, all the differenced are abstracted by the unified typemap
library.

Examples/test-suite/li_std_auto_ptr.i

@@ -12,7 +12,7 @@
 #endif
 %}
 
-#if defined(SWIGCSHARP) || defined(SWIGJAVA) || defined(SWIGPYTHON)
+#if defined(SWIGCSHARP) || defined(SWIGJAVA) || defined(SWIGPYTHON) || defined(SWIGRUBY)
 
 %include "std_auto_ptr.i"
 

Examples/test-suite/ruby/li_std_auto_ptr_runme.rb

@@ -0,0 +1,43 @@
+#!/usr/bin/env ruby
+
+require 'swig_assert'
+
+require 'li_std_auto_ptr'
+
+k1 = Li_std_auto_ptr::makeKlassAutoPtr("first")
+k2 = Li_std_auto_ptr::makeKlassAutoPtr("second")
+swig_assert_equal_simple(Li_std_auto_ptr::Klass::getTotal_count(), 2)
+
+k1 = nil
+GC.start
+
+# GC can need a few runs to actually collect the object.
+100.times do ||
+  next if Li_std_auto_ptr::Klass::getTotal_count() == 2
+
+  swig_assert_equal_simple(Li_std_auto_ptr::Klass::getTotal_count(), 1)
+  break
+end
+
+swig_assert_equal_simple(k2.getLabel(), "second")
+
+if Li_std_auto_ptr::Klass::getTotal_count() != 1
+  STDERR.puts "GC failed to collect the first object, count still #{Li_std_auto_ptr::Klass::getTotal_count()}"
+
+  # Skip the rest of the test as it's not going to work correctly anyhow.
+  exit
+end
+
+k2 = nil
+GC.start
+
+100.times do ||
+  next if Li_std_auto_ptr::Klass::getTotal_count() == 1
+
+  swig_assert_equal_simple(Li_std_auto_ptr::Klass::getTotal_count(), 0)
+  break
+end
+
+if Li_std_auto_ptr::Klass::getTotal_count() != 0
+  STDERR.puts "GC failed to collect the second object, count still #{Li_std_auto_ptr::Klass::getTotal_count()}"
+end