[libgda] GtkDoc: ignore documentation xml file

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 6a39b34655c13b8ce8f77abd72116e87af7ea2b5
Author: Daniel Espinosa <esodan gmail com>
Date:   Thu Aug 2 08:48:39 2018 -0500

    GtkDoc: ignore documentation xml file

 po/POTFILES.skip | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/po/POTFILES.skip b/po/POTFILES.skip
index b06c665a9..d8acc7438 100755
--- a/po/POTFILES.skip
+++ b/po/POTFILES.skip
@@ -1,7 +1,7 @@
 # List of source files that should *not* be translated.
 # Please keep this file sorted alphabetically.
 control-center/gda-control-center-6.0.desktop.in
-doc/C/prov-writing-assembly.xml
+doc/C/libgda/prov-writing-assembly.xml
 libgda/data/Table.c
 libgda/sqlite/sqlite-src/sqlite3.c
 libgda/sqlite/sql-parser.c/lemon.c