libgnome: Fix build failure with latest version of glib2

Closes: https://trac.macports.org/ticket/54989

gnome/libgnome/Portfile

@@ -36,7 +36,8 @@ depends_lib \
     port:libiconv \
     port:gettext
 
-patchfiles      patch-libgnome-Makefile.am.diff
+patchfiles      patch-libgnome-Makefile.am.diff \
+                patch-libgnome-gnome-config.h.diff
 
 # reconfigure using upstream autogen.sh for intltool 0.51 compatibility
 

gnome/libgnome/files/patch-libgnome-gnome-config.h.diff

@@ -0,0 +1,12 @@
+Remove non-UTF-8 chars to fix build failure with latest glib-mkenums
+--- libgnome/gnome-config.h.orig	2009-04-23 04:29:13.000000000 -0500
++++ libgnome/gnome-config.h	2017-10-04 02:17:22.000000000 -0500
+@@ -270,7 +270,7 @@
+ #define gnome_config_private_clean_key(path) \
+ 	(gnome_config_clean_key_((path),TRUE))
+
+-/* returns the true filename of the config file */
++/* returns the true filename of the config file */
+ #define gnome_config_get_real_path(path) \
+ 	(g_build_filename (gnome_user_dir_get(),(path),NULL))
+ #define gnome_config_private_get_real_path(path) \