Bump external/elfio from 2b457dd to 9814eaa (#177)

Bumps [external/elfio](https://github.com/serge1/ELFIO) from `2b457dd` to `9814eaa`.
- [Release notes](https://github.com/serge1/ELFIO/releases)
- [Commits](serge1/ELFIO@2b457dd...9814eaa)

---
updated-dependencies:
- dependency-name: external/elfio
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>