harfbuzz: Build HarfBuzz GObject wrapper

As GLib is installed, also build the GObject wrapper [1].

> --with-gobject: This switch enables building of the HarfBuzz GObject
> wrapper. Remove it if you did not install GLib.

[1] http://www.linuxfromscratch.org/blfs/view/svn/general/harfbuzz.html

harfbuzz.be0

@@ -23,6 +23,7 @@ SRCURL[0]="https://www.freedesktop.org/software/harfbuzz/release/harfbuzz-${PKGV
 
 mee_configure() {
     bee_configure \
+        --with-gobject \
         --with-graphite2
 }