build(deps): bump third_party/nextpnr from bb5a816 to 0d1ea9e (#501)

Bumps [third_party/nextpnr](https://github.com/antmicro/nextpnr) from `bb5a816` to `0d1ea9e`.
- [Release notes](https://github.com/antmicro/nextpnr/releases)
- [Commits](antmicro/nextpnr@bb5a816...0d1ea9e)

---
updated-dependencies:
- dependency-name: third_party/nextpnr
  dependency-type: direct:production
...

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Author: dependabot[bot]