Re: patch for Autoconf "make check" that tests the wrong Autoconf

[Akim Demaille]

| I installed the following patch to fix this.  I'm not quite sold
| on the distinction between @abs_top_srcdir@ (used for autom4te_perllibdir)
| and @abs_top_builddir@ (used for everything else), and I suspect that
| the resulting tests still aren't correct when builddir != srcdir.
| But it does work correctly for me when builddir == srcdir, tested
| on a system where Autoconf was not already installed.

perllib_dir designates the content of Autom4te/, which is not
config.status'ed, contrary to all the rest.

| Also, wrapsh.as and wrappl.as have much in common after the change,
| but I don't understand the reason for the two distinct programs so I
| didn't try to merge them.

That's historical I guess.  Feel free to merge.