[gnome-characters] build: Fix appdata installation

[Kalev Lember <klember src gnome org>]

commit cdbb6a50131810c154720d614f87b0f54860418f
Author: Kalev Lember <klember redhat com>
Date:   Sat Aug 27 10:39:03 2016 +0200

    build: Fix appdata installation
    
    Add back @APPSTREAM_XML_RULES@ that got accidentally lost in the gettext
    conversion.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=770472

 data/Makefile.am |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/data/Makefile.am b/data/Makefile.am
index 8115716..3c346f9 100644
--- a/data/Makefile.am
+++ b/data/Makefile.am
@@ -25,6 +25,8 @@ gsettings_SCHEMAS = org.gnome.Characters.gschema.xml
 
 appstream_XML = org.gnome.Characters.appdata.xml
 
+@APPSTREAM_XML_RULES@
+
 org.gnome.Characters.appdata.xml: org.gnome.Characters.appdata.xml.in
        $(AM_V_GEN) $(MSGFMT) --xml --template $< -d $(top_srcdir)/po -o $@