Bug#685159: os-prober does not detect Fedora17

["yannubuntu@gmail.com" <yannubuntu@gmail.com>]

NEW ELEMENTS:
- Debian testing and Ubuntu12.04 (os-prober 1.51) are affected by the bug: their os-prober detect Fedora16 but not Fedora17.
- Ubuntu11.04 (os-prober 1.44) detects Fedora17

So the bug seems to be a regression of os-prober. And it seems to be restricted to the detection of Fedora17.