GCC 2.8.1

[Mark Kettenis]

Just a quick note.  I've switched my Linux -> Hurd cross-compiler to
GCC 2.95.2.  This probably means that nobody regularly build (parts of
glibc) using GCC 2.8.1 anymore.  I suggest we disallow GCC 2.8.1 to
build glibc 2.2 as soon as someone reports a build problem that
mentions GCC 2.8.1.

Mark