Updated openstack/openstack
Project: openstack/python-swiftclient  029ade17d2b1db63911a1622262f9b40df75a72d
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Only run flake8 on swiftclient code

In particular, this skips the "build" directory, which is prone to
containing stuff that doesn't comply with all the hacking checks. The
actual code we care about all lives in three places, so let's only
check those.

Change-Id: I4a3be59913ad85a5a9e91d254f4d3f4b0b1cc7b7