pkgconfig: upgraded package to upstream

Upgraded virtual/pkgconfig to version 2 on amd64

BUG=chromium:1039058
TEST=libxslt builds

Change-Id: I321adcd56f4adbf26ac5938d30eea5274fa449d9
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2335456
Tested-by: Allen Webb <allenwebb@google.com>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
7 files changed