ci: Use clang-8 for fuzzing to run on aarch64 ci systems

Author: MarcoFalke

ci/test/00_setup_env_native_fuzz.sh

@@ -6,10 +6,11 @@
 
 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 PACKAGES="clang-8 llvm-8 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++"
+export BITCOIN_CONFIG="--enable-fuzz --with-sanitizers=fuzzer,address,undefined CC=clang-8 CXX=clang++-8"
+# Use clang-8, instead of default clang on bionic, which is clang-6 and does not come with libfuzzer on aarch64