Use C++17 to build scudo

Author: jvoisin

build-bench-env.sh

@@ -505,7 +505,7 @@ if test "$setup_scudo" = "1"; then
   partial_checkout scudo $version_scudo https://github.com/llvm/llvm-project "compiler-rt/lib/scudo/standalone"
   cd "compiler-rt/lib/scudo/standalone"
   # TODO: make the next line prettier instead of hardcoding everything.
-  clang++ -flto -fuse-ld=lld -fPIC -std=c++14 -fno-exceptions $CXXFLAGS -fno-rtti -fvisibility=internal -msse4.2 -O3 -I include -shared -o libscudo$extso *.cpp -pthread
+  clang++ -flto -fuse-ld=lld -fPIC -std=c++17 -fno-exceptions $CXXFLAGS -fno-rtti -fvisibility=internal -msse4.2 -O3 -I include -shared -o libscudo$extso *.cpp -pthread
   cd -
   popd
 fi