glibc ABI symbol list checking

[Roland McGrath]

> I'm currently generating files for i.86-.*-linux.*.  Do you like to
> have these?

:-) That is one I am already sure I can do myself.  The reason I haven't
put minimal files with a platform or two in yet is that I want to come up
with a way for make check to be happy with both tls and non-tls builds
where we have some known incompatibility (missing errno et al).