Update select-value WPT for SelectParserRelaxation

This was pointed out here:
whatwg/html#10557 (comment)

Change-Id: I443ddd71e48ecefe598a7be07d0705a68db36d02

Author: josepharhar

html/semantics/forms/the-select-element/select-value.html

@@ -46,7 +46,7 @@
   var div = document.createElement('div');
   select.appendChild(div);
   div.appendChild(option);
-  assert_equals(select.value, '');
+  assert_equals(select.value, '1');
 }, 'option is child of div');
 
 test(function() {