harfbuzz: New package

HarfBuzz is an OpenType text shaping engine

http://www.freedesktop.org/wiki/Software/HarfBuzz/



[Peter: Move to libraries/graphics, needs C++ support]
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>