Update .po files
Release 1.4.1
asfdemux: add ASF_OBJ_METADATA_LIBRARY_OBJECT

We can safely ignore those but best to claim to understand this object type so
we don't raise a warning.

https://bugzilla.gnome.org/show_bug.cgi?id=736060
Update .po files
Release 1.4.2
Update .po files
Release 1.4.3