CHROMIUM: move CROS_ARTIFACTS_TMP_DIR init to setup phase

The clean phase is run twice -- once at the start and once at the end.
Move the creation of the dir to the setup phase which happens at the
start after the clean phase so we don't leave behind empty dirs after
we finish merging everything.

BUG=b:187795688
TEST=emerging package doesn't leave behind empty dirs

Change-Id: I12c0df4ad9cefc7e1d2a2d47b02d0aee6e4234a0
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/portage_tool/+/3833511
Reviewed-by: Michael Benfield <mbenfield@google.com>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
1 file changed