Bumps the clutter dependency to 0.9 in nbtk.pc.in
Bumps the clutter dependency to 0.9 in nbtk.pc.in

pwithnall/mx,jonnylamb/mx,jonnylamb/mx,clutter-project/mx,clutter-project/mx,pwithnall/mx,pwithnall/mx,jonnylamb/mx,clutter-project/mx,jonnylamb/mx,clutter-project/mx,pwithnall/mx