setup.cfg: adjust flake8 section so invoking it without arguments works

Instead of having to invoke `flake8 grml2usb` let's add the
files to the flake8 section in setup.cfg, so it's enough to
invoke just `flake8`.

Thanks: Florian Apolloner

diff --git a/setup.cfg b/setup.cfg
index fe326c8..d27b669 100644 (file)
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,2 +1,3 @@
 [flake8]
 ignore = E203, E501, W503
+filename = ./grml2usb, *.py