Fix broken arc angle polarity due to library symbol changes.
Fix broken wire and text Y axis coordinate polarity due to library symbol
changes.
Fix broken field visibility and position on library symbols with multiple
units that have fields with different visibility and positions. Because
KiCad does not support this, when parsing the Eagle schematic file, the
last library symbol unit parsed ends up being the field visibility and
position for all units in the symbol.
5e048bc64c