asfdemux: only add "format" field with fourcc to WMV caps

Doesn't make sense for e.g. H264 or MJPEG.
Automatic update of common submodule

From d48bed3 to 1a07da9
tests: Don't build disabled plugins' check tests

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=723505
Merge remote-tracking branch 'upstream/master' into ruih/merge-2014-02-04