harfbuzz: enable optional graphite2 support

Enable building harfbuzz with the optional graphite2 support.
Also switch --without-X configure options to the correct/documented
--with-X=no syntax.

Signed-off-by: Gustavo Zacarias <gustavo.zacarias@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>