[evdev_trace] Use line buffered mode for stdout. Fixes JB#31852
[evdev_trace] Use line buffered mode for stdout. Fixes JB#31852

maikelwever/mce,android-808/mce,kimmoli/mce,mlehtima/mce,android-808/mce,spiiroin/mce,android-808/mce,kimmoli/mce,kimmoli/mce,mlehtima/mce,spiiroin/mce,spiiroin/mce,maikelwever/mce,maikelwever/mce,maikelwever/mce,android-808/mce,kimmoli/mce,mlehtima/mce,mlehtima/mce,spiiroin/mce