chainlint: fix for core.autocrlf=true

chainlint: fix for core.autocrlf=true

The `chainlint` target compares actual output to expected output, where
the actual output is generated from files that are specifically checked
out with LF-only line endings. So the expected output needs to be
checked out with LF-only line endings, too.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Acked-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>