create test for serialized selecter which is only one simple selector in the sequence of simple selectors
modify serialized selector test

* add title
* rename a function
Merging PR #46 - https://github.com/w3c/csswg-test/pull/46
moved to submitted folder and added reviewer link

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rename : contributors/ttwf_tokyo/lequinharay/incoming/selectorSerialize.html => contributors/ttwf_tokyo/lequinharay/submitted/selectorSerialize.html