Log Message:
Add another directory to the Cflags variable in the
pkg-config file.

This fixes problem where non-pkgsrc software builds using this info
can also find the ft2build.h header. (Not noticed in pkgsrc itself
because that include file is already known.)

This is also done in upstream version in the 2.2 release candidates.
The commit log message upstream is:
    builds/unix/freetype2.in (CFlags): Add missing directory.

Bump PKGREVISION.