contrib: openjpeg: update config.{guess,sub}

(cherry picked from commit 2e554edca115a506bdb7ec07323aebf3e628fd0f)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

contrib/src/openjpeg/rules.mak

@@ -11,6 +11,7 @@ $(TARBALLS)/openjpeg_v$(OPENJPEG_VERSION).tgz:
 openjpeg: openjpeg_v$(OPENJPEG_VERSION).tgz .sum-openjpeg
 	$(UNPACK)
 	$(APPLY) $(SRC)/openjpeg/pkg-config.patch
+	$(UPDATE_AUTOCONFIG)
 	$(MOVE)
 
 .openjpeg: openjpeg