update spidermonkey 27 to 28 for win32
fix char16_t from wchar_t to unsigned int for win32
update mozjs-27.lib to mozjs-28.lib
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js into spidermonkey28
Merge branch 'SMv28' of https://github.com/pandamicro/cocos2d-js into spidermonkey28
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js into spidermonkey28
Merge branch 'master' of https://github.com/cocos2d/cocos2d-js into spidermonkey28
Merge pull request #304 from joshuastray/spidermonkey28

issue #4916:Upgrade SpiderMonkey to v28