mit-krb5: fix pkg-config usage

This is fixed in latest Gentoo ebuilds already.

BUG=chromium:985180
TEST=CQ passes

Change-Id: I015f6955ed73bff3592c6db25e8fa91a99e85ad4
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2213743
Reviewed-by: Lutz Justen <ljusten@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
2 files changed