For bind chained fixups (pointing to imports parsed in the previous
commit) we reuse the patching code for classic relocs as the logic is
more generic here than for local chained fixups.
* Drop sdb_json in `librz/cons/grep.c`
* Do not print the JSON key in grep
* Use proper JSON paths in tests
* Use signed number in case of RzJson in tests
* Do not add quotes for sole RZ_JSON_STRING