New license request: LGPL variant (from GNOME)

**License Homepage URL**

https://github.com/GNOME/libdex/blob/main/src/dex-aio.c

**License Notes**

```
"matches": [
{
"license_expression": "lgpl-2.1-plus",
"license_expression_spdx": "LGPL-2.1-or-later",
"from_file": "dex-aio.c",
"start_line": 5,
"end_line": 16,
"matcher": "3-seq",
"score": 99.05,
"matched_length": 104,
"match_coverage": 100.0,
"rule_relevance": 100,
"rule_identifier": "lgpl-2.1-plus_243.RULE",
"rule_url": "https://github.com/nexB/scancode-toolkit/tree/develop/src/licensedcode/data/rules/lgpl-2.1-plus_243.RULE"
},

```

Quite close to an existing rule, but the difference is that the address is different and has been replaced by just a link to a GNU.org URL.