python bindings: update public API define string
python bindings: update public API define string

Matches 6a06521577edabfbc7ab1191adede2c86767b7f3 commit

geoffsalmon/vlc-python,pombreda/git.videolan.org-vlc-bindings-python,metakermit/vlc-bindings-python,metakermit/vlc-bindings-python,kermit666/vlc-bindings-python,oaubert/python-vlc,geoffsalmon/vlc-python,pombreda/git.videolan.org-vlc-bindings-python,kermit666/vlc-bindings-python,oaubert/python-vlc