Add helloworld example #11

Job	Run time
build (examples/AdjustBacklight/AdjustBacklight.ino)	1m 38s
build (examples/Arduino_GFX_HelloWorld/Arduino_GFX_HelloWorld.ino)	1m 34s
build (examples/Arduino_GFX_SpriteGif/Arduino_GFX_SpriteGif.ino)	1m 48s
build (examples/BatteryVoltage/BatteryVoltage.ino)	1m 37s
build (examples/lv_benchmark/lv_benchmark.ino)	1m 30s
build (examples/lv_factory/lv_factory.ino)	1m 58s
build (examples/lv_helloworld/lv_helloworld.ino)	1m 27s
build (examples/lv_gif/lv_gif.ino)	1m 38s
build (examples/lv_images/lv_images.ino)	1m 39s
build (examples/lv_music/lv_music.ino)	1m 49s
build (examples/lv_qrcode/lv_qrcode.ino)	1m 27s
build (examples/RGBPanel/RGBPanel.ino)	1m 42s
build (examples/TFT_eSPI_Sprite/TFT_eSPI_Sprite.ino)	1m 33s
build (examples/Touchpad/Touchpad.ino)	1m 25s
	22m 45s

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