altcoins.bitcoin-abc: 0.16.2 -> 0.17.0

Semi-automatic update generated by https://github.com/ryantm/nixpkgs-update tools.

This update was made based on information from https://repology.org/metapackage/bitcoin-abc/versions.

These checks were done:

- built on NixOS
- ran ‘/nix/store/vwqhg8q3z2dd624hwhfgi5w0n26674xm-bitcoin-abc-0.17.0/bin/bitcoind -h’ got 0 exit code
- ran ‘/nix/store/vwqhg8q3z2dd624hwhfgi5w0n26674xm-bitcoin-abc-0.17.0/bin/bitcoind --help’ got 0 exit code
- ran ‘/nix/store/vwqhg8q3z2dd624hwhfgi5w0n26674xm-bitcoin-abc-0.17.0/bin/bitcoin-cli -h’ got 0 exit code
- ran ‘/nix/store/vwqhg8q3z2dd624hwhfgi5w0n26674xm-bitcoin-abc-0.17.0/bin/bitcoin-cli --help’ got 0 exit code
- ran ‘/nix/store/vwqhg8q3z2dd624hwhfgi5w0n26674xm-bitcoin-abc-0.17.0/bin/bitcoin-tx -h’ got 0 exit code
- ran ‘/nix/store/vwqhg8q3z2dd624hwhfgi5w0n26674xm-bitcoin-abc-0.17.0/bin/bitcoin-tx --help’ got 0 exit code
- ran ‘/nix/store/vwqhg8q3z2dd624hwhfgi5w0n26674xm-bitcoin-abc-0.17.0/bin/test_bitcoin --help’ got 0 exit code
- found 0.17.0 with grep in /nix/store/vwqhg8q3z2dd624hwhfgi5w0n26674xm-bitcoin-abc-0.17.0
- directory tree listing: https://gist.github.com/986ce04c77ecd347fc83c78829ee2005