[telegnome] Use modern AppStream installation directory

[Colin Watson <cjwatson src gnome org>]

commit 2f778785191f399acb5e3c49f2bbd001d038d644
Author: Colin Watson <cjwatson debian org>
Date:   Sat Sep 8 10:03:18 2018 +0100

    Use modern AppStream installation directory
    
    /usr/share/metainfo was made the canonical path in AppStream 0.9.4,
    released on 2016-04-18.

 Makefile.am | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/Makefile.am b/Makefile.am
index 3d932ad..edfd83e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -12,7 +12,7 @@ apps_DATA = telegnome.desktop
 telegnome.desktop: telegnome.desktop.in
        $(AM_V_GEN)$(MSGFMT) --desktop --template $< -d $(top_srcdir)/po -o $@
 
-appstreamdir = $(datadir)/appdata
+appstreamdir = $(datadir)/metainfo
 appstream_in_files = telegnome.appdata.xml.in
 appstream_DATA = telegnome.appdata.xml