fastuidraw/painter/filled_path: rely on glu-tess to filter out bd-edges
fastuidraw/painter/filled_path: rely on glu-tess to filter out bd-edges

Now that glu-tess no longer merges faces that include the outer-bd points,
FilledPath no longer needs to track if a point is a boundary-edge point.

01org/fastuidraw,01org/fastuidraw