[webapi]Update reference files for CSS3 Color tests to reflect the latest W3C repo

Impacted tests(approved):new 0,update 2,delete 0
Unit test platform:[android]
Unit test result summary:pass 2,fail 0,block 0
Merge pull request #1186 from chenxix/upstream/modify-third

[webapi] Update reference files for CSS3 Color tests to reflect the latest W3C repo