npapi xcb: distribute xembed.h
npapi xcb: distribute xembed.h

Signed-off-by: Rafaël Carré <29a40ef51885229607cd1e19e467be5d13190cad@videolan.org>

chengsun/gtk-npapi-vlc,jamesbates/npapi-vlc,chengsun/gtk-npapi-vlc,jamesbates/npapi-vlc,jamesbates/npapi-vlc,chengsun/gtk-npapi-vlc