Bug#472021: pyflakes: ftbfs with fixed python-central

[Matthias Klose <doko@cs.tu-berlin.de>]

Package: pyflakes
Version: 0.2.1+svn14502-1
Severity: serious
Usertags: ftbfs-new-pycentral

python-central 0.6 fixes bug #452227, removing an empty directory
usr/lib. Your package tries to remove that directory as well, not
ignoring the error code. Please either ignore the error code, or
remove the directory removal and build-depend on python-central (>= 0.6)
instead.