Fix build.sh

build.sh

@@ -3,6 +3,6 @@ set -e
 
 mkdir build
 cd build
-clang -o first ../test/test_arena.cpp -Wno-writable-strings
+clang -o test_arena ../test/test_arena.cpp -fno-exceptions -fno-rtti -Wno-writable-strings
-./first
+./test_arena
 cd ..