UBUNTU: [Packaging] git-ubuntu-log -- fix detection of packaging changes

The recent update to handle multiple bugs/cves has an error in
the detection of packaging changes, causing them to be denoted as
upstream changes in the changelog. Change this logic to check the
subject field instead of the non-existent title field.

Ignore: yes
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

debian/scripts/misc/git-ubuntu-log

@@ -23,7 +23,7 @@ def add_entry(entry):
         combo = sorted(combo)
 
         if len(combo) == 0:
-            if entry.get('title', "").startswith('UBUNTU'):
+            if entry.get('subject', "").startswith('UBUNTU'):
                 combo = '__packaging__'
             else:
                 combo = '__mainline__'