[Tizen][Runtime] Should not check the package version for Tizen web
application when updating.

In Tizen platform, package version checking should be ignored when
updating, means that the downgrade and reinstall a package is
permitted, and this is the same behavior as Tizen WRT.

BUG=XWALK-1771
Merge pull request #1992 from takethathe/update-version

[Tizen][Runtime] Should not check the package version for Tizen web application when updating.
[Runtime] Fix wrong write of variable name on js.

Fix it.