Base: Add two more radio buttons to HTML input test page

You can't really test radio buttons with just one button.

Base/res/html/misc/input.html

@@ -32,7 +32,9 @@
     <input type="range" id="range" value="range" /><br />
     <input type="color" id="color" value="color" /><br />
     <input type="checkbox" id="checkbox" value="checkbox" /><br />
-    <input type="radio" id="radio" value="radio" /><br />
+    <input type="radio" id="radio-a" value="a" name="test-radio" /><br />
+    <input type="radio" id="radio-b" value="b" name="test-radio" /><br />
+    <input type="radio" id="radio-c" value="c" name="test-radio" /><br />
     <input type="file" id="file" value="file" /><br />
     <input type="submit" id="submit" value="submit" /><br />
     <input type="image" id="image" value="image" /><br />