License file for example/ble_peripheral 'plugins'

I have two projects each for the nRF51 and nRF52 SDKs. To use them one simply drops them into the correct SDK/examples/ble_peripheral directory. One supports the ongoing GHS BT SIG profile and the other is an engineering prototype which is similar to the GHS but significantly simpler - the Bluetooth is just an opaque transporter of application packets. So it could equally well be done on USB.

IN any case, these projects are publicly available on GitHub. The only code that is there are the 'plugins'. A user has to download the SDK in order to build/use them. The 'main.c' file has the original license inherited from the main.c files of all these projects. Is this sufficient or should I add an additional license file?

Thanks

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