Antonio Murdaca 889843574b volume: evaluate symlinks before relabeling mount source
Simple reproducer:

```sh
$ mkdir /var/foo
$ touch /var/foo/test
$ ln -s /var/foo /var/bar
$ docker run -ti -v /var/bar:/var/bar:Z fedora sh
sh-4.3# ls -lZ /var/bar/
ls: cannot open directory '/var/bar/': Permission denied
```

Signed-off-by: Antonio Murdaca <runcom@redhat.com>
Upstream-commit: e0b22c0b9e013527ef121250b51ae780d2d2912d
Component: engine
2017-09-19 10:54:03 +02:00
S
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