Update to 0.9.28.
USE_BZIP2 -> USES=tar:bzip2
USE_GNOME=ltverhack -> USES=libtool:keepla
Use INSTALL_TARGET=install-strip to strip libraries.
This should fix a build failure as reported in 
PR: ports/188797 
Submitted by: Kurt Jaeger <firstname.lastname@example.org>
Enable disabled support for cairo, graphite and icu support. It was pointed
out to me that there is a subtle build failure in future webkit releases and
that libreoffice 4.1 depends on the icu support in harfbuzz.
Pointed out by: olivierd@ (via priv mail) and ftigeot (on IRC)