config/targets: update aarch64_be-linux-user gdb XML list

config/targets: update aarch64_be-linux-user gdb XML list

Attempting to run the binary asserts when it can't find the XML entry.
We can fix it so we don't although I suspect other stuff is broken.

Fixes: https://gitlab.com/qemu-project/qemu/-/issues/2580
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20241023113406.1284676-13-alex.bennee@linaro.org>
(cherry picked from commit 591e848aca7af3b4d25af03ed5bd266c479054bf)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>