[cantarell-fonts] build: Add POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit c3e4ed8d1d589fac53f0be8f680af73735eef13e
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Tue Feb 6 02:34:45 2018 +0100

    build: Add POTFILES.in

 appstream/POTFILES.in |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/appstream/POTFILES.in b/appstream/POTFILES.in
new file mode 100644
index 0000000..357c1c3
--- /dev/null
+++ b/appstream/POTFILES.in
@@ -0,0 +1,3 @@
+# List of source files containing translatable strings.
+# Please keep this file sorted alphabetically.
+appstream/org.gnome.cantarell.metainfo.xml.in