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

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: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>