[gnome-photos] build: Install appstream metadata to non-deprecated location

[Debarshi Ray <debarshir src gnome org>]

commit e66e0cd7e77e57c04fd16410c0ba0ebc53a62015
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Sun Feb 18 07:50:52 2018 -0500

    build: Install appstream metadata to non-deprecated location
    
    https://gitlab.gnome.org/GNOME/gnome-photos/merge_requests/23

 data/Makefile.am | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/data/Makefile.am b/data/Makefile.am
index 0919c5fc..1c37f7a4 100644
--- a/data/Makefile.am
+++ b/data/Makefile.am
@@ -1,6 +1,6 @@
 SUBDIRS = icons
 
-appdatadir = $(datadir)/appdata
+appdatadir = $(datadir)/metainfo
 appdata_in_files = org.gnome.Photos.appdata.xml.in
 appdata_DATA = $(appdata_in_files:.xml.in=.xml)