Re-create favicon.ico from the new SVG image.
Use a 152x152 apple touch icon.
Move apple-touch-icon-precomposed.png and favicon.ico in docs root.

This way, it works in all browsers.
new icons
Losslessly compress apple-touch-icon-precomposed.png.
Merge pull request #13189 from twbs/apple-touch-icon

New apple touch icon and favicon