Add L_1008_2520Metric

[chschlue]

https://github.com/easyw/kicad-3d-models-in-freecad/pull/378

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• [x] A screenshot of the model(s) aligned with KiCad footprint(s)
• [x] Source files are contributed on the apropriate location
  • Link to the package3d-source pull request or to the script pull request
• [x] Step model submitted in 1:1 scale
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[diegoherranz]

Checked the dimensions in the STEP file and it looks OK. The WRL looks to be in the 1:2.54 scale. No other comments. Merging. Thanks!