[PATCH] libctf: use libtool for link test in configure

[Nick Alcock]

On 8 Nov 2022, Indu Bhagat uttered the following:

> Looks like its better to deal with this patch out of the SFrame series.  It has
> been discussed previously in the thread
> https://sourceware.org/pipermail/binutils/2022-November/124102.html
> and seems to be converging.
>
> Testing notes:
>   - regression testing of libctf/ on x86_64-linux-gnu works well.
>
> OK for trunk?

My first impressions are that this looks good, but I'll throw it past my
usual test matrix before giving it a final ack: if that passes, it's OK.

(That this gives me the opportunity to test some outstanding binutils
things of mine at the same time, and that both changes involve libtool
so require similar sets of tests, is *pure coincidence*.)

-- 
NULL && (void)