chroot_version_hooks.d: Run dev-rust cleanup.

This updates the original cleanup_dev_rust hook to call eclean first so
it is no longer an approximation, and adds a new symlink so it will be
called again now that https://crrev.com/c/3292629 has landed.

BUG=None
TEST=Local testing and CQ passes

Change-Id: I4d4e5e507de2859d27ee6e9eefe19ffe09f95529
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/3300517
Tested-by: Allen Webb <allenwebb@google.com>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Allen Webb <allenwebb@google.com>
2 files changed