add a spec for the new __annotation__ feature

test/test-android/app/rubymotion/java_annotation_spec.rb

@@ -0,0 +1,16 @@
+class Java_Annotation_Test < Java::Lang::Object
+  __annotation__('@android.webkit.JavascriptInterface')
+  def foo
+    42
+  end
+end
+
+describe "Java annotations" do
+  it "can be attached to Ruby methods using the __annotation__() class method" do
+    method = Java_Annotation_Test.getMethod('foo', [])
+    method.should != nil
+    annotations = method.getDeclaredAnnotations
+    annotations.size.should == 1
+    annotations[0].toString.should == '@android.webkit.JavascriptInterface()'
+  end
+end