Workaround for wildcard output selector bug in solc <= 0.5.8

[cameel]

Related to ethereum/solidity#14214.

In ethereum/solidity#6606 (released in 0.5.9) we fixed a bug that broke the * at source level. Since solc-js acts as a compatibility layer for older binaries, we should include a workaround for that bug here.

We can avoid triggering the bug by modifying the input JSON to either use * at contract level as well or by listing all contract explicitly.

Repro

{
    "language": "Solidity",
    "sources": {
        "C.sol": {
            "content": "pragma solidity *; contract C {}"
        }
    },
    "settings": {
        "outputSelection": {"*": {"C": ["evm.bytecode"]}}
    }
}

{
    "contracts": {
        "C.sol": {
            "C": {
                "evm": {
                    "bytecode": {
                        "linkReferences": {},
                        "object": "",
                        "opcodes": "",
                        "sourceMap": ""
                    }
                }
            }
        }
    },
    "sources": {
        "C.sol": {
            "id": 0
        }
    }
}