Added delay https://github.com/Xinyuan-LilyGO/LilyGo-EPD47/issues/178 #30

Job	Run time
build (examples/screen_repair/screen_repair.ino)	45s
build (examples/drawImages/drawImages.ino)	46s
build (examples/spi_driver/spi_driver.ino)	46s
build (examples/button/button.ino)	52s
build (examples/demo/demo.ino)	1m 0s
build (examples/drawExample/drawExample.ino)	45s
build (examples/grayscale_test/grayscale_test.ino)	51s
build (examples/wifi_sync/wifi_sync.ino)	55s
build (examples/touch/touch.ino)	50s
	7m 30s

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