[Tizen] Appid format must be XXX.XXX[.XXX]*

Tizen framework requires that Appid format of native app must be XXX.XXX[.XXX]*,
not just XXX. We make our web app pretend native app to Tizen, so we must follow
the format. Otherwise, app_get_id() in app.h in Tizen application framework
failes and XWalk can not initialize appcore.

BUG=https://github.com/crosswalk-project/crosswalk/issues/609
Merge pull request #650 from luxtella/appid

[Tizen] Appid format must be XXX.XXX[.XXX]*