Update test-pangocairo-threads to new threads API
Update test-pangocairo-threads to new threads API

danny-ku/pango,kari-lentz/alpha-pango,kari-lentz/alpha-pango,kari-lentz/alpha-pango,Distrotech/pango,kari-lentz/alpha-pango,danny-ku/pango,danny-ku/pango,Distrotech/pango,Distrotech/pango