CLI generates weird names for smart contract files

Command: `solcjs --overwrite --abi --bin -o ./test/contract-artifacts ./test/contracts/*`

When using native `solc`, generated files have reasonable names like `DumbContract.abi`, `DumbContract.bin` (same as original). With solcjs filenames contain full path like: `__test_contracts_DumbContract_sol_DumbContract.abi`

Is this behaviour intended? It makes it painful to work with generated files. We do it in integration tests for one of my projects and its super weird to work with these files later: https://github.com/Neufund/TypeChain/blob/master/test/integration/DumbContract.spec.ts#L5

Start at the solcjs CLI path that generates output filenames and compare its naming behavior with native solc. Use the TypeChain integration reference in test/integration/DumbContract.spec.ts to understand how the artifacts are consumed; done should mean generated ABI and binary files use the contract names without the full source path, with regression coverage.

Written by the indexing model from the issue text.