Basegfx gets a basegfx::tools::number2PolyPolygon method that
converts a number 0-9 into a 7-segment digit display polygon.
Change-Id: I4d3326c9fe9e42d07a6248781127f19ac27d8b72
see https://gerrit.libreoffice.org/#/c/3367/
and Change-Id: I00c96fa77d04b33a6f8c8cd3490dfcd9bdc9e84a for details
Change-Id: I199a75bc4042af20817265d5ef85b1134a96ff5a