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

[Jonathan Matthew <jmatthew src gnome org>]

commit 0861184f6fa45058e09aa51ac1a09b18e06c55af
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Sun Nov 26 19:00:17 2017 -0500

    build: Install appstream metadata to non-deprecated location
    
    https://bugzilla.gnome.org/show_bug.cgi?id=790876

 data/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/Makefile.am b/data/Makefile.am
index 9cda00e..9f42798 100644
--- a/data/Makefile.am
+++ b/data/Makefile.am
@@ -32,7 +32,7 @@ servicedir = $(datadir)/dbus-1/services
 service_in_files = org.gnome.Rhythmbox3.service.in
 service_DATA = $(service_in_files:.service.in=.service)
 
-appdatadir = $(datadir)/appdata
+appdatadir = $(datadir)/metainfo
 appdata_DATA = $(appdata_in_files:.xml.in=.xml)
 appdata_in_files = rhythmbox.appdata.xml.in