[Patch] Configure broken for Solaris 2.6 (PR#12014)

[Andrew Tridgell]

> Surely *one* of these is supported on Solaris 2.6/7.0 :-).

On my Solaris 2.6 box with the WorkShop compiler 4.2 it gets:

  checking statvfs function (SVR4)... yes

Maybe it only works in the southern hemisphere?