tracker-extract: remove application/vnd.ms-* catchall from msoffice

Otherwise we match on application/vnd.ms-asf (the .asf video container
format), which is not an OLE2 file and msoffice cannot handle.

https://bugzilla.gnome.org/show_bug.cgi?id=733317
tracker-extract: recognize application/vnd.ms-asf for the gstreamer plugin

application/vnd.ms-asf is the new standard name for video/x-ms-asf.

https://bugzilla.gnome.org/show_bug.cgi?id=733317