How to express package dependency that doesn't require updating?

[David Shao <davshao%gmail.com@localhost>]

I would like to have the line

CONFIGURE_ARGS+=    --with-pciids-path=${PREFIX}/share/pciids

added to the Makefile for libpciaccess, but I would like libpciaccess
to only care that misc/pciids is installed and not update as a
dependency when pciids is updated with say:

pkg_rolling-replace -suv

libpciaccess would only care that the file pci.ids is in the directory
/usr/pkg/share/pciids/ and not what the contents of that file are for
updating purposes.

The file pci.ids is updated frequently, and it would be extremely
painful to update every single port depending on libpciaccess every
time pci.ids is updated.