http://sdlemu.ngemu.com/handysdl.php is down.
Fetching directly from SRC_URI fails with a size mismatch: !!! Fetched file: Handy-SDL-0.82R1.i386.linux-glibc22.tar.bz2 VERIFY FAILED! !!! Reason: Filesize does not match recorded size !!! Got: 104388 !!! Expected: 158228 docs/Handy.html says: This HTML document is the README and MANUAL of the free Atari Lynx emulator Handy/SDL. Handy/SDL is a free/legal/portable emulator for the Atari Lynx handheld by Atari. This emulator does not contain any copyrighted materials and was developed entirely from scratch by Keith Wilkins. @Licenses team: If the package "does not contain any copyrighted materials" then it is in the public domain? Can we assume this?
The statement doesn't make much sense to me. But I don't think anyone can fault us for making your proposed assumption.
Fixed, LICENSE="public-domain no-source-code" plus a comment explaining it.