ci: Enable D_GLIBCXX_DEBUG for multiprocess task

ci/test/00_setup_env_native_multiprocess.sh

@@ -9,8 +9,8 @@ export LC_ALL=C.UTF-8
 export CONTAINER_NAME=ci_native_multiprocess
 export DOCKER_NAME_TAG=ubuntu:20.04
 export PACKAGES="cmake python3"
-export DEP_OPTS="MULTIPROCESS=1"
+export DEP_OPTS="DEBUG=1 MULTIPROCESS=1"
 export GOAL="install"
-export BITCOIN_CONFIG="--enable-external-signer"
+export BITCOIN_CONFIG="--enable-external-signer --enable-debug"
 export TEST_RUNNER_ENV="BITCOIND=bitcoin-node"
 export RUN_SECURITY_TESTS="true"