gdbstub: lightly refactor connection to avoid snprintf

This may be a bit too much to avoid an snprintf and the slightly dodgy
assign to a const variable. But hopefully not.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20230630180423.558337-29-alex.bennee@linaro.org>
1 file changed