See http://autobuild.buildroot.org/results/c78/c78e5cbf1b6f2ec25f34f752d2fd58a6a38b55b7/build-end.log. It seems to be caused by the _ symbol prefix needed on Blackfin.
Sonic, it would be good to fix this for 2014.05. Could you have a look and stupid a patch in the next few days? Thanks!
In fact, since PCI is not used on Blackfin (marked as broken since 2008 in the kernel), there's probably little reason to worry about getting pciutils to build. Marking this bug as WONTFIX. I've submitted a patch at http://patchwork.ozlabs.org/patch/350772/ to disable pciutils on Blackfin.