CB-7494 Fixes wrong replacements in *.appxmanifest files

Fix for https://issues.apache.org/jira/browse/CB-7494

Fixes cordova/build script failure when project's name contain unicode and config.xml is empty (e.g. when project created using bin/create script)
Vladimir, could you please also file separate issue to correct placeholders names; looks like 
$(safe)projectname is actually a package name. I would refine those names moving forward