add nkmcu

hc

2023-11-06 170c1c0fa90ad9f762d1877f8a57efce706fc95a

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# locally computed hash
sha256 29c35426a416bf454413c6fec24c24a0b633e26144a17e98351b6dffaa4a833b  leptonica-1.74.4.tar.gz