Fix Cherry and Matias keyswitch Fab line thickness

[fauxpark]

check_kicad_mod.py was complaining about these. Per F5.2.1.a, the recommended Fab line thickness is 0.1mm, though it is allowable up to 0.15mm.

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All contributions to the kicad library must follow the KiCad library convention

Thanks for creating a pull request to contribute to the KiCad libraries! To speed up integration of your PR, please check the following items:

• Provide a URL to a datasheet for the footprint(s) you are contributing
• An example screenshot image is very helpful
• If there are matching symbol or 3D model pull requests, provide link(s) as appropriate
• Check the output of the Travis automated check scripts - fix any errors as required
• Give a reason behind any intentional library convention rule violation.

[poeschlr]

We specifically allowed up to 0.15 to make sure all our old footprints still fulfill the KLC at least in spirit. This is such that users know what to expect.

The testscripts are a bit more strict and try to get everything to the value that we hope to end up with after some amount of time.

[evanshultz]

@DanSGiesbrecht
I'm going to go ahead and merge this to get it done with 5.1 approaching. It's simple enough and does just what it says on the tin.

[evanshultz]

@fauxpark
Thanks once again!