make_chroot: move /etc/debian_chroot init to cros_sdk

It seems like a small thing, but there's a lot of conditional logic
in here to support resuming & building from different sources that
we no longer care about.  So delete all of that and move the file
creation to cros_sdk.

BUG=b:191307774
TEST=`cros_sdk` still works

Change-Id: Ieb258a18dfb3db63e90469451169575c49d3dc5c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/2971571
Reviewed-by: Alex Klein <saklein@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
1 file changed