Remove parameter names from libiberty.h

[Paul Schlie]

> Kaveh R. Ghazi writes:
> As noted here:
> http://sourceware.org/ml/binutils/2005-04/msg00269.html
> 
> The new f*open_unlocked function prototypes in libiberty.h are in
> conflict with binutils sources because one of the parameter names
> ("mode") gets defined to "31" and the build dies.

Why not alternatively fix the real problem (as you had noted), as opposed to
indirectly establishing the policy that libiberty prototypes don't include
parameter names (as it doesn't seem like the true solution to the problem).