profiles: Enable multilib infrastructure for amd64 chromeos profile

Inherit from regular amd64/10.0 profile instead of its no-multilib
variant and allow having multilib USE flag set.

BUG=b:36540057
TEST=cbuildbot chromiumos-sdk falco-release caroline-release

Change-Id: I953a05fb4f97546dfa6d3cf3991fceb25a96243b
Reviewed-on: https://chromium-review.googlesource.com/485001
Commit-Ready: Tomasz Figa <tfiga@chromium.org>
Tested-by: Tomasz Figa <tfiga@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
5 files changed