[patch] libstdc++/68921 add timeout argument to futex(2)

[Torvald Riegel]

On Tue, 2015-12-15 at 18:46 +0000, Jonathan Wakely wrote:
> This fixes a missing argument to the futex syscall.
> 
> Tested powerpc64le-linux. This needs to be fixed for gcc-5 and trunk.
> 

OK.  Thanks!