Fix fuzzer_one_entry_runner.sh to pass shellcheck

test/core/util/fuzzer_one_entry_runner.sh

@@ -15,4 +15,4 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-$1 $2
+"$1" "$2"