[gimp/gimp-2-10] po: update POTFILES.skip

[Michael Natterer <mitch src gnome org>]

commit e34fc45ccb3a5211b7a623f138d738933d2b6409
Author: Michael Natterer <mitch gimp org>
Date:   Fri May 25 22:10:18 2018 +0200

    po: update POTFILES.skip
    
    (cherry picked from commit 7d36b463dc42339fe95598c99af91341df9b0b13)

 po/POTFILES.skip | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/po/POTFILES.skip b/po/POTFILES.skip
index 173331d025..35757d2bc9 100644
--- a/po/POTFILES.skip
+++ b/po/POTFILES.skip
@@ -3,6 +3,7 @@ build/windows/installer/lang/setup.isl.in
 data/tags/gimp-tags-default.xml.in
 data/tips/gimp-tips.xml.in
 desktop/org.gimp.GIMP.appdata.xml.in
+desktop/gimp-data-extras.metainfo.xml.in
 desktop/gimp.desktop.in
 libgimp
 libgimpbase