marcelduran/yslow — pull request #33 by okuryu (2012-05-09 14:41:58+00:00)
Title: Avoid error with GNU tail

I have following problem to build ySlow for PhantomJS.

```
$ make phantomjs
building PHANTOMJS...
tail: invalid option -- 'r'
Try `tail --help' for more information.
tail: invalid option -- 'r'
Try `tail --help' for more information.
done
```

```
$ uname -a
Linux www6292uf 2.6.32-40-server #87-Ubuntu SMP Tue Mar 6 02:10:02 UTC 2012 x86_64 GNU/Linux
```

```
$ tail --version
tail (GNU coreutils) 7.4
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later .
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Paul Rubin, David MacKenzie, Ian Lance Taylor,
and Jim Meyering.
```

GNU `tail` don't accept `-r` option. It's should use `tac` instead of `tail` to avoid this issue.