confuse-2.6 required to support uClinux/Nios2

[mav <spl...@gm...>]

hi,

[libusb-1.0.16-rc10] requires [confuse-2.5], which does not cross compile
for uClinux/NiosII.

[confuse-2.6] has the updated configure script that compiles successfully.

thanks,
mav