[PATCH, head+2.21] Fix IRONLY visibility estimation in plugin interface, resolves GCC PR

[Dave Korn]

On 19/11/2010 03:34, Dave Korn wrote:

>   Will get on with committing.  Thanks for being patient, Tristan.

  Committed to head and branch, rebuilt and tested branch (have used head with
this patch for repeated lto-bootstraps of gcc in past couple of weeks), no
FAILs, thank you everyone, from my POV we're good to go!

    cheers,
      DaveK