Add include for toplevel self(main)

mrbgems/mruby-toplevel-ext/mrbgem.rake

@@ -0,0 +1,4 @@
+MRuby::Gem::Specification.new('mruby-toplevel-ext') do |spec|
+  spec.license = 'MIT'
+  spec.authors = 'mruby developers'
+end

mrbgems/mruby-toplevel-ext/mrblib/toplevel.rb

@@ -0,0 +1,4 @@
+
+def self.include (*modules)
+  self.class.include *modules
+end

mrbgems/mruby-toplevel-ext/test/toplevel.rb

@@ -0,0 +1,24 @@
+##
+# Toplevel Self(Ext) Test
+
+module ToplevelTestModule1
+  def method_foo
+    :foo
+  end
+
+  CONST_BAR = :bar
+end
+
+module ToplevelTestModule2
+  CONST_BAR = :bar2
+end
+
+assert('Toplevel#include') do
+  self.include ToplevelTestModule2, ToplevelTestModule1
+  
+  assert_true self.class.included_modules.include?( ToplevelTestModule1 )
+  assert_true self.class.included_modules.include?( ToplevelTestModule2 )
+  assert_equal :foo, method_foo
+  assert_equal :bar2, CONST_BAR
+end
+