GDB RP: breakpoint commands, fix breakpoints across function calls

[MaxDesiatov]

This allows setting breakpoints at arbitrary line or function in LLDB CLI interface.

Also fixed multiple bugs:

1. Attempts to set breakpoints for any function other than the entrypoint failed as those were uncompiled functions when lazy compilation is used.
2. WasmKit used wrong order of call stack Pc addresses when sending qWasmCallStack response back via GDB RP.