Add LICENSE about pdk-includes HOT 6 CLOSED

Pull Request to add Copyright and License information: #6

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SDCC suggested GPL + LinkExcpetion. LGPL is a bit different.

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SDCC suggested GPL + LinkExcpetion. LGPL is a bit different.

Yeah, I couldn't really find that as an 'official' license. Do you have a link that shows that as being a real thing?

I couldn't find it on http://www.gnu.org/licenses, and it isn't directly listed on their exceptions page either: https://www.gnu.org/licenses/exceptions.html

GitHub doesn't know about it: https://docs.github.com/en/github/creating-cloning-and-archiving-repositories/licensing-a-repository

SPDX doesn't directly list it (unless it is one of the deprecated ones): https://spdx.org/licenses/

Wikipedia isn't really all that clear, although they do list LGPL as being related: https://en.wikipedia.org/wiki/GPL_linking_exception

Or, do we just list this as GPL 2.0 and include our own exception text (similar to what SDCC uses)? That feels a bit dirty to not use an 'official' license, but maybe it is ok?

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Ok, here is a different PR with GPL v2 with Linking Exception: #7

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For more details on a GPL+LE, see e.g.:

https://www.gnu.org/licenses/gcc-exception-3.1.en.html

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Copyright and LICENSE information was merged via Pull Request #7

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