[ofw] build warning with ipoib

[Sean Hefty]

>The WinOF 2.2 RC0 installs mlx4 & mthca drivers with no problems on Svr 2008,
>Svr 2008 HPC, R2, Svr 2003 & XP {x64,x86 & ia64}.
>As of Monday evening the trunk and branches\WOF2-2 were in sync and functioning
>correctly w.r.t. driver installation.
>Are you sure you're source in-sync and wiped all .obj & trunk\bin\* files prior
>to building?

I updated my svn tree yesterday and rebuilt with -wgc.  The install works fine.
It's uninstalling ipoib and restarting the system that has issues for me.  I
will try to capture a stack dump later today to see if it provides any insight.