swaybar: Replace fgets with read and own buffer
swaybar: Replace fgets with read and own buffer

taiyu-len/sway,sleep-walker/sway,ascent12/sway,ascent12/sway,colemickens/sway,taiyu-len/sway,crondog/sway,colemickens/sway,ascent12/sway,sleep-walker/sway,johalun/sway,mikkeloscar/sway,4e554c4c/sway,taiyu-len/sway,4e554c4c/sway,colemickens/sway,1ace/sway,ptMuta/sway,SirCmpwn/sway,crondog/sway,1ace/sway,1ace/sway,mikkeloscar/sway