more .pc changes
more .pc changes

see https://github.com/jcupitt/libvips/issues/196

jcupitt/libvips,wishabi/libvips,lovell/libvips,wishabi/libvips,lovell/libvips,jcupitt/libvips,mcanthony/libvips,mcanthony/libvips,leiyangyou/libvips,wishabi/libvips,mcanthony/libvips,leiyangyou/libvips,lovell/libvips,wishabi/libvips,lovell/libvips,leiyangyou/libvips,jcupitt/libvips,jcupitt/libvips,leiyangyou/libvips,mcanthony/libvips