added some tooling to basegfx
(cherry picked from commit 97fa4faaa0b09724cf98dbf22390b283ba57b41c)
Conflicts:
basegfx/inc/basegfx/numeric/ftools.hxx
Change-Id: Ib15c43cf4d5b50605ec596dab498e3a678f3734a
see https://gerrit.libreoffice.org/#/c/3367/
and Change-Id: I00c96fa77d04b33a6f8c8cd3490dfcd9bdc9e84a for details
Change-Id: I199a75bc4042af20817265d5ef85b1134a96ff5a