Adding an integer to a C string does pointer math, rather than
converting to string. Instead convert the result of `GetLastError` to
string before adding it to the error message.
This problem was accidentally introduced by commit 8b1257e7bf (Debugger:
Replace libuv with platform-specific connection code, 2023-07-29).
Signed-off-by: William R. Dieter <william.r.dieter@intel.com>
Remove libuv usage from CMake debugger. Libuv has an async io model
and cppdap uses a sync model, so an extra thread and a buffer copy
were necessary to match semantics. In order to eliminate those
costs this commit implements the IO using platform specific APIs.