* gnu/packages/patches/pciutils-hurd64.patch: New file.
* gnu/local.mk (dist_patch_DATA): Register it.
* gnu/packages/pciutils.scm (pciutils)[arguments]: Use g-expressions. When
building for the 64bit Hurd, use it in new "apply-hurd64-patch" phase.
Change-Id: I8936377da726681b748cc010e1fbae3fb19dee05