efitools/gnu-efi: add CrOS Flex owners

These packages are only used by CrOS Flex.

BUG=b:248730256
TEST=CQ passes

Change-Id: Ia1fdc582e92a41a020595d6f01894726a759e70e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/3915256
Auto-Submit: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Ted Brandston <tbrandston@google.com>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Ted Brandston <tbrandston@google.com>
4 files changed