tools/elfutils: update to 1.91

tools/elfutils: update to 1.91

Release Notes:
https://sourceware.org/pipermail/elfutils-devel/2024q1/006876.html

Manually refresh:
- 100-portability.patch

Change:
- replace libgen.h with gnulib "dirname" module for compilation errors:
    In file included from ./../libdw/libdwP.h:38,
                     from eblobjnote.c:42:
    /usr/include/libgen.h:35:9: error: attempt to use poisoned "basename"
       35 | #define basename        __xpg_basename
          |         ^

Tested-by: Georgi Valkov <gvalkov@gmail.com> # MacOS
Co-Developed-by: Nick Hainke <vincent@systemli.org>
Signed-off-by: Nick Hainke <vincent@systemli.org>
Signed-off-by: Tony Ambardar <itugrok@yahoo.com>