Revert "Fix IPv6 support on lldb-server platform"

This reverts commit c28f81797084b8416ff5be4f9e79000a9741ca6a.
This reverts commit 7e79b64642486f510f7872174eb831df68d65b84.

Looks like there is more work to be done on this patch. I've spoken to
the author and for the time being we will revert to keep the buildbots
green.

llvm-svn: 361086