scripts/test now outputs a valgrind log

scripts/test

@@ -20,7 +20,7 @@ fi
 if [[ "$MODE_ARG" =~ .*valgrind ]]; then
   MODE="$MODE_ARG"
   VALGRIND=true
-  PROXY='valgrind -s --leak-check=full --show-leak-kinds=all'
+  PROXY='valgrind -s --log-file=logs/valgrind.log --leak-check=full --show-leak-kinds=all'
   TARGET=debug
 fi
 
@@ -40,4 +40,5 @@ if [[ ! -x "$PROGRAM" ]]; then
   exit 1
 fi
 
+mkdir -p logs
 LD_LIBRARY_PATH=./lib $PROXY "$PROGRAM" $@