dev-python: Remove clang-python from portage-stable

clang-python from portage-stable currently depends on sys-devel/clang
which is the "empty" package.
Dependency should change to sys-devel/llvm.

The chain of changes moves sys-devel/clang to chromiumos-overlay to
allow the change.

BUG=chromium:1028424
TEST=sudo emerge sys-devel/clang-python

Cq-Depend: chromium:2070651
Change-Id: I57d0a57434a1a2a4d472ab47954327e2bb8d7536
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2070690
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Denis Nikitin <denik@chromium.org>
Tested-by: Denis Nikitin <denik@chromium.org>
4 files changed