Yurii Rashkovskii edfdc1d818 fish-foreign-env: suppress additional harmless warnings ...

As per #30645, fish with fish-foreign-env prints this
(harmless) warning:

```
set: Tried to change the read-only variable “_”
```

This patch was developed by @rnhmjoj in the aforementioned
issue discussion

2017-11-14 16:15:58 +07:00

..

default.nix

…

suppress-harmless-warnings.patch

…