enter_chroot: Bind mount /lib/modules as read only.

This allows modprobing host modules inside the chroot such as
usbip-host.

BUG=None
TEST=modprobe usbip-host

Change-Id: Ie9948afec10c52ce6b7141d7002758e7f72f7995
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/2134643
Tested-by: Allen Webb <allenwebb@google.com>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
1 file changed