updating large-allocation header support info, as it is turned on by default as of Fx54
updating large-allocation header support info, as it is turned on by default as of Fx54

mdn/browser-compat-data,chrisdavidmills/browser-compat-data,chrisdavidmills/browser-compat-data,teoli2003/browser-compat-data,mdn/browser-compat-data