debian: Update the submodule again

Update the submodule to latest 3.3 git head.

Signed-off-by: Gergely Nagy <algernon@balabit.hu>
debian/tools: Ignore .travis.yml when generating tarballs / exports

Signed-off-by: Gergely Nagy <algernon@balabit.hu>
debian/tools/bootstrap.sh: Make it work in the exported dir too.

Signed-off-by: Gergely Nagy <algernon@balabit.hu>