profiles: merge host & target distdir

This avoids having two copies of downloaded archives & git trees.
They fetch from the same sources, so shouldn't be any problems.

BUG=None
TEST=CQ passes & SDK bootstraps

Cq-Depend: chromium:2276308
Change-Id: Ibfde28d264425c3f13e0b264db1d64b4eb3ba2c5
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/chromiumos-overlay/+/2277139
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Alex Klein <saklein@chromium.org>
2 files changed