Add configs for BlackBerry Maps location documents

Ensure that `.xloc` text files will:

 * be served with the `text/vnd.rim.location.xloc ` media type
 * have their character encoding specified as `UTF-8`
 * be compressed (they are basically XML files, therefore, they
   compress quite nicely)
 * not be served with any of the `HTML` document related headers

Ref: http://www.manualslib.com/manual/368494/Blackberry-Java-Development-Environment-Gps-And-Maps-Development-Guide.html?page=28
     http://docs.blackberry.com/en/developers/deliverables/18168/BlackBerry_Browser-Feature_and_Technical_Overview--1214041-0804111258-001-6.0-US.pdf

Ref: h5bp/server-configs-apache#43