Add support for svg in .list-style-image

* You can now use .list-style-image-svg for support for svg.

* Please see I5196952088e584d3121600e9e829647e8c195bbb for it being used on vector.

Note: This has been tested by me.

Change-Id: Iffff2bc52e1572e661930242ad15937bc83abace