build_sdk_board: move chromite setup here

Set this up when creating the SDK rather than when unpacking it.

BUG=b:191307774
TEST=CQ passes

Change-Id: I444bc73cf1be408d2c7f5259ac782e754177bff1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/4851347
Commit-Queue: Greg Edelston <gredelston@google.com>
Auto-Submit: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Greg Edelston <gredelston@google.com>
Tested-by: Mike Frysinger <vapier@chromium.org>
1 file changed