enter_chroot.sh: bind mount cidb credentials into chroot

Build slaves will store cidb access credentials, which need to be
accessible from inside the chroot.

TEST=Entered chroot and verified that credentials directory in my home
directory appeared in chroot home directory.

Change-Id: Ic3379cb22c009c5f8b545f8a46b8cb464e11f36b
Reviewed-on: https://chromium-review.googlesource.com/209684
Tested-by: Aviv Keshet <akeshet@chromium.org>
Reviewed-by: David James <davidjames@chromium.org>
Commit-Queue: Aviv Keshet <akeshet@chromium.org>
1 file changed