This basically reverts 324212ce which
forced wget to only use IPv4.

dev-www.libreoffice.org's IPv6 support was broken for a while.  It
appears to be back to working.

Change-Id: Ib235ddd5719089eaf9d4559bd913571fc46069d1
Reviewed-on: https://gerrit.libreoffice.org/33558Reviewed-by: jan iversen <jani@documentfoundation.org>
Tested-by: jan iversen <jani@documentfoundation.org>