bad dependency in pg_dump output related to support function breaks binary upgrade

Hi

some Orafce's user reported problems with pg_upgrade. I checked this issue
and it looks like pg_dump problem:

pg_restore: creating FUNCTION "public.nvarchar2("public"."nvarchar2",
integer, boolean)"
pg_restore: while PROCESSING TOC:
pg_restore: from TOC entry 612; 1255 33206 FUNCTION
nvarchar2("public"."nvarchar2", integer, boolean) pavel
pg_restore: error: could not execute query: ERROR: function
public.nvarchar2_transform(internal) does not exist
Command was: CREATE FUNCTION "public"."nvarchar2"("public"."nvarchar2",
integer, boolean) RETURNS "public"."nvarchar2"
LANGUAGE "c" IMMUTABLE STRICT SUPPORT "public"."nvarchar2_transform"
AS '$libdir/orafce', 'nvarchar2';

--
-- TOC entry 612 (class 1255 OID 33206)
-- Name: nvarchar2("public"."nvarchar2", integer, boolean); Type: FUNCTION;
Schema: public; Owner: pavel
--

CREATE FUNCTION "public"."nvarchar2"("public"."nvarchar2", integer,
boolean) RETURNS "public"."nvarchar2"
LANGUAGE "c" IMMUTABLE STRICT SUPPORT "public"."nvarchar2_transform"
AS '$libdir/orafce', 'nvarchar2';

-- For binary upgrade, handle extension membership the hard way
ALTER EXTENSION "orafce" ADD FUNCTION
"public"."nvarchar2"("public"."nvarchar2", integer, boolean);

ALTER FUNCTION "public"."nvarchar2"("public"."nvarchar2", integer, boolean)
OWNER TO "pavel";

--
-- TOC entry 607 (class 1255 OID 33201)
-- Name: nvarchar2_transform("internal"); Type: FUNCTION; Schema: public;
Owner: pavel
--

CREATE FUNCTION "public"."nvarchar2_transform"("internal") RETURNS
"internal"
LANGUAGE "c" IMMUTABLE STRICT
AS '$libdir/orafce', 'orafce_varchar_transform';

-- For binary upgrade, handle extension membership the hard way
ALTER EXTENSION "orafce" ADD FUNCTION
"public"."nvarchar2_transform"("internal");

ALTER FUNCTION "public"."nvarchar2_transform"("internal") OWNER TO "pavel";

the supporting function should be dumped first before function where
supporting function is used.

Regards

Pavel