UBUNTU: [Packaging] git-ubuntu-log -- fix order of tracking bug commit

The package tracking bug number is not inserted anymore on the changelog
by the link-to-tracker script. Instead, it creates/updates the
debian.<branch>/tracking-bug file and commits the change.

We want this commit to be added to the changelog in a similar fashion as
before, as the first entry. So change the git-ubuntu-log script to
detect that commit and insert it in the right place.

Ignore: yes
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Acked-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

debian/scripts/misc/git-ubuntu-log

@@ -27,6 +27,13 @@ def add_entry(entry):
                 combo = '__packaging__'
             else:
                 combo = '__mainline__'
+        else:
+            if entry.get('subject', "") == 'UBUNTU: link-to-tracker: update tracking bug':
+                # Construct a key with '__trackingbug__' on the first position
+                # and the tracking bug number afterwards
+                combo.insert(0, '__trackingbug__')
+                # Tracking bug goes at the top
+                keys.insert(0, combo)
             else:
                 if combo not in keys:
                     keys.append(combo)
@@ -34,7 +41,6 @@ def add_entry(entry):
         entry['key'] = combo
         entries.append(entry)
 
-
 # Suck up the git log output and extract the information we need.
 keys = []
 entry = None
@@ -90,6 +96,10 @@ for key in keys:
         for bug in key:
             if bug.startswith('CVE-'):
                 title_set.append(bug)
+            elif bug == '__trackingbug__':
+                # Look for the tracking bug number on the second
+                # position of the key
+                continue
             else:
                 bug_info = None
 
@@ -132,6 +142,7 @@ for key in keys:
 
             emit_title = False
 
+        if key[0] != '__trackingbug__':
             title_lines = textwrap.wrap(entry['subject'], 76)
             print('    - ' + title_lines[0])
             for line in title_lines[1:]: