ci: Run non-cross-compile builds natively

ci/test/00_setup_env_native_fuzz.sh

@@ -0,0 +1,15 @@
+#!/usr/bin/env bash
+#
+# Copyright (c) 2019 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+export LC_ALL=C.UTF-8
+
+export PACKAGES="clang llvm python3 libssl1.0-dev libevent-dev bsdmainutils libboost-system-dev libboost-filesystem-dev libboost-chrono-dev libboost-test-dev libboost-thread-dev"
+export NO_DEPENDS=1
+export RUN_UNIT_TESTS=false
+export RUN_FUNCTIONAL_TESTS=false
+export RUN_FUZZ_TESTS=true
+export GOAL="install"
+export BITCOIN_CONFIG="--enable-fuzz --with-sanitizers=fuzzer,address,undefined CC=clang CXX=clang++"