Description of problem:
"fedpkg lint" is broken for arch-specific packages. Even after successfully building the package locally, a subsequent call of "fedpkg lint" fails with the following error message:
"Could not run rpmlint: Need to build the rpms first"

Version-Release number of selected component (if applicable):
fedora-packager-0.5.9.2-1.fc15.noarch

How reproducible:
100%

Steps to Reproduce:
1. fedpkg clone -a xbindkeys
(you can use any other package which does not only generate noarch RPMs)
2. cd xbindkeys; fedpkg local
3. fedpkg lint
  
Actual results:
"Could not run rpmlint: Need to build the rpms first"

Expected results:
rpmlint check for all built RPMs.

Additional info:
/usr/lib/python2.7/site-packages/pyfedpkg/__init__.py:

- lint(): checks whether the built binaries exists in the arch-specific paths, the list of archs is created in _get_build_arches_form_srpm() based on self.localarch
- self.localarch is set by _getlocalarch() which is calling "rpm --eval %{_arch}"
- "rpm --eval %{_arch}" reports "i386" and so the list of architectures which are used in lint() contains "i386"
- however, "fedpkg local"/rpmbuild places puts the packages in "i686/" and so the mentioned check fails

- as a workaround a symlink like i386->i686 can be used

However, I'm not sure who is at fault here: fedpkg, rpm or probably a configuration option of them...