[webapi][XWALK-3013] Update reference file links for CSS3 Fonts tests

Add missed reference file entry
Impacted tests(approved):new 0,update 8,delete 0
Unit test platform:[android]
Unit test result summary:pass 8,fail 0,block 0
Merge pull request #1278 from chenxix/webapi/modify-font

[webapi][XWALK-3013] Update reference file links for CSS3 Fonts tests