[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 use 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.
The encode error is exist in the source file in https://review.tizen.org/gerrit/gitweb?p=platform/framework/web/wrt-installer.git;a=blob;f=configuration/widgets.xsd;h=8de2f3de354e26c5a9bdf6f83ced6db264a68881;hb=refs/heads/tizen. According to http://dev.w3.org/2006/waf/widgets-schema/widgets.rnc, I will update it.