Sort rpm/deb files alphabetically

This is rather trivial, but it makes comparing the files much easier

Change-Id: I01e42defbf778626afd8dd457f93f0b02dd1a19d
diff --git a/files/rpms/horizon b/files/rpms/horizon
index b2cf0de..aeb2cb5 100644
--- a/files/rpms/horizon
+++ b/files/rpms/horizon
@@ -1,5 +1,5 @@
 Django
 httpd # NOPRIME
 mod_wsgi  # NOPRIME
-pyxattr
 pcre-devel  # pyScss
+pyxattr