chroot_version_hooks.d: clean up ~/chromiumos/.cache/ state before linking

A few devs seem to have ~/chromiumos/.cache/common/ but nothing else.
That dir is safe to nuke, so do so automatically.

BUG=b:209485932
TEST=CQ passes

Change-Id: I63fd735d4d7906734d0ca3ac491b021811e27c5e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/3344012
Reviewed-by: Cindy Lin <xcl@google.com>
Tested-by: Mike Frysinger <vapier@chromium.org>
1 file changed