bisect-kit: Fix localbuild symlink bug

There are times when the symlink created must point to a path inside the
chromeos chroot instead of to a path in the chromeos root checkout.
This patch removes asserts that were triggered when they shouldn't have
as well as creating the correct symlinks.

BUG=b:181066424
TEST=# switch_cros_localbuild.py

Change-Id: I0b7cd30eb393d137df6657d04c65c66161e5aaeb
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/bisect-kit/+/2811865
Commit-Queue: Jae Hoon Kim <kimjae@chromium.org>
Tested-by: Jae Hoon Kim <kimjae@chromium.org>
Auto-Submit: Jae Hoon Kim <kimjae@chromium.org>
Reviewed-by: Kuang-che Wu <kcwu@chromium.org>
2 files changed