[PATCH roland/ehdr_start] Use __ehdr_start, when available, for rtld to get its own headers.

[Roland McGrath]

> Roland McGrath <roland@hack.frob.com> writes:
> 
> > So, I think you really should figure out the linker's bug and both get the
> > linker fixed and get our generic configure check to catch buggy linkers.
> 
> The linker should already be fixed, I couldn't reproduce it with
> 2.24.0.20140601.

I wonder if you can find the fix in binutils ChangeLogs.  That might point
the way to what we need to do in the configure check to catch the buggy ones.