Fix RLP helper script permissions during Space build

scripts/install.sh

@@ -54,6 +54,8 @@ pushd "${ROOT_DIR}/submodules/rlp" >/dev/null
 "${PYTHON_BIN}" setup.py build_ext --inplace
 popd >/dev/null
 
+find "${ROOT_DIR}/submodules/rlp/puzzles" -type f -name "*.sh" -exec chmod +x {} +
+
 mkdir -p "${ROOT_DIR}/submodules/rlp/rlp/lib"
 pushd "${ROOT_DIR}/submodules/rlp/rlp/lib" >/dev/null
 cmake ../../puzzles