Sometimes bugzilla set the mimetype to application/wps-office.<the extension> incorrectly.
Ie: Our bugzilla shows 80 bugs with those mimetypes: http://tinyurl.com/ybjrmldu

Change-Id: I9f73c65604d45e76430a2d34401bcfa883534445
Reviewed-on: https://gerrit.libreoffice.org/34101Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Xisco Faulí <xiscofauli@libreoffice.org>