The line 'notmuch' in the toplevel .gitignore file is to broad
and matches bindings/python/notmuch making it cumbersome to
git-add files within that directory.
Refine the toplevel file to only match the generated notmuch
executable and add a more specialized .gitignore file to the
python directory.
Signed-off-by: Justus Winter <4winter@informatik.uni-hamburg.de>