component/harfbuzz: fix missing rpath

component/gtk-2/buildout.cfg

@@ -60,7 +60,7 @@ configure-options =
 environment =
   PATH=${glib:location}/bin:${freetype:location}/bin:${pkgconfig:location}/bin:%(PATH)s
   PKG_CONFIG_PATH=${:pkg_config_depends}
-  LDFLAGS=-L${gettext:location}/lib -Wl,-rpath=${gettext:location}/lib -L${bzip2:location}/lib -Wl,-rpath=${bzip2:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib
+  LDFLAGS=-L${gettext:location}/lib -Wl,-rpath=${gettext:location}/lib -L${bzip2:location}/lib -Wl,-rpath=${bzip2:location}/lib -L${zlib:location}/lib -Wl,-rpath=${zlib:location}/lib -L${icu4c:location}/lib -Wl,-rpath=${icu4c:location}/lib
 
 [fribidi]
 recipe = slapos.recipe.cmmi