[Tizen] Adding some xsd file into crosswalk

Because crosswalk has replaced WRT in Tizen common image, some metadata
file which provided by wrt-installer package are missed. These files are
xml schema file, which is used to verify xml in widget matching Tizen
requirements. For example, widgets.tizen.xsd and widgets.xsd  are used
to verify config.xml in widget is valid config.xml which should match
http://www.w3.org/TR/widgets/. if the widget is not valid widget,
crosswalk shouldn’t install them in Tizen platform.

BUG=XWALK-2245