update gitignore
update gitignore


Former-commit-id: 603d1c11f085c76801884f51386469a724c0f0d8 [formerly 8ea6296d9fcc37ff7e7009c83a3a0ba724243f60]
Former-commit-id: d025408ceaf446b4436aa6c6258e38c23a18adb0
arduino/arduino-create-agent,arduino/arduino-create-agent,arduino/arduino-create-agent,arduino/arduino-create-agent