devel (rawhide) builds should pull from f17 Fedora rawhide

[Alex Lancaster]

Currently devel builds still pull from f16, rather than f17 Fedora rawhide and
packages still have "fc16" in their tags.  This should be fixed ASAP, now that
Fedora 16 is in GA.

Also:

common/branches in CVS shows:

 devel:rawhide-free:.fc16:fedora:16

that should be:

 devel:rawhide-free:.fc17:fedora:17

and rawhide-free repo needs to point to actual f17, not f16.

See:

https://bugzilla.rpmfusion.org/show_bug.cgi?id=2031