build(deps): bump third_party/symbiyosys from `1402969` to `5ef5187`
build(deps): bump third_party/symbiyosys from `1402969` to `5ef5187`

Bumps [third_party/symbiyosys](https://github.com/YosysHQ/SymbiYosys) from `1402969` to `5ef5187`.
- [Release notes](https://github.com/YosysHQ/SymbiYosys/releases)
- [Commits](https://github.com/YosysHQ/SymbiYosys/compare/1402969a964c19c324f6c7f77c3e61785e1dcaac...5ef5187673b2ad91744ef0c36aef3df597bdeb02)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
SymbiFlow/symbiflow-arch-defs,SymbiFlow/symbiflow-arch-defs