gnocchi: chdir to tempdir in uwsgi
gnocchi: chdir to tempdir in uwsgi

This avoids running uwsgi in a directory where potentially a gnocchi dir is
there. In that case uwsgi would use it as . seems to be in its Python path by
default.

sileht/pifpaf,jd/pifpaf,sileht/pifpaf,jd/pifpaf,sileht/pifpaf