name ID 256 stuff

Posted 2 issues in fontbakery but no answer, so trying here.
https://github.com/googlefonts/fontbakery/issues/3749
https://github.com/googlefonts/fontbakery/issues/3671

With Emma we noted we often get these two fails:

🔥 FAIL: Checking with fontTools.ttx ([com.google.fonts/check/ttx-roundtrip](https://font-bakery.readthedocs.io/en/latest/fontbakery/profiles/universal.html#com.google.fonts/check/ttx-roundtrip))
🔥 FAIL name id 256 missing from name table
ℹ INFO While converting TTF into an XML file, ttx emited the messages listed below.

🔥 FAIL: Check name table for empty records. ([com.adobe.fonts/check/name/empty_records](https://font-bakery.readthedocs.io/en/latest/fontbakery/profiles/name.html#com.adobe.fonts/check/name/empty_records))
🔥 FAIL "name" table record with key=(3, 1, 1033, 256) is empty and should be removed. [code: empty-record]

**This is how it looks like in the name table:**

**In platform 1**

```

NSWACTFoundation


wght

```

**In platform 3**

```

NSWACTFoundation





wght

```

This nameID often get filled up with stylistic sets names, or the axis name. I have no idea why it would be wrong to have it empty or missing.