gdbstub and testing fixes for 8.2 This is the current state for my maintainer queue getting ready for the first PR into the tree. It includes the previous testing/next fixes as well as some more cleanups to modernise the gdbstub tests and code. It also includes Matheus' fixes for SIGINT. v2 - added style patch - added comment move for gdbstub The following patches still need review: gdbstub: move comment for gdb_register_coprocessor gdbstub: replace global gdb_has_xml with a function gdbstub: refactor get_feature_xml gdbstub: remove unused user_ctx field (1 acks, 1 sobs, 0 tbs) tests: remove test-gdbstub.py tests/tcg: remove quoting for info output