Fix deprecate warning "extern crate ... as ..."

Its arguments were inverted.

For instance it displayed this message:

```
warning: this extern crate syntax is deprecated. Use: extern create "foobar" as foo;
```

Instead of:

```
warning: this extern crate syntax is deprecated. Use: extern create "foo" as foobar;
```

While you're at it, might want to fix the misspelling of "crate" as "create" here.