Commit: Update libiberty

[Nick Clifton]

Hi Simon,

>>    I am applying the patch below to synchronize our copy of the libiberty
>>    sources with those in the gcc development tree.

> I think this is the cause of the autoregen failure:
> 
> https://inbox.sourceware.org/binutils/20260107185435.987604BA2E06@sourceware.org/T/#u

Darn.

> I can reproduce the failure locally:
>      configure.ac:161: error: m4_defn: undefined macro: GCC_AC_FUNC_MMAP

It seems that we have some local changes to the libiberty sources of which
I was not aware.  After a little research I found the problem and so I have
applied commit a502e852fd2 to restore the changes from commit
219822fd5db6305592b45677a3b38c02b523360e

Sorry about that.

Cheers
   Nick