[PATCH] mtrace: Fix output with PIE and ASLR [BZ #22716]

[DJ Delorie]

Siddhesh Poyarekar <siddhesh@sourceware.org> writes:
> It looks like setting it to empty, i.e.
>
>      env LD_TRACE_PRELINKING= $prog
>
> also works just as well.  I'll send v2 with that.

That even more so begs for a comment explaining it ;-)