Indenting algorithm is confused by Windows CRLF line endings

## Expected behavior

```
(let [x y]
  expr)
```
## Actual behavior

```
(let [x y]
      expr)
```
## Steps to reproduce the problem

CRLF line ending at the end of the let line.
## Environment & Version information
### clojure-mode version information

```
  20161004.2314
```

Version 5.5.2
### Emacs version

Emacs 25.1.1
### Operating system

Windows 10
