[webapi] Integrate WebCL conformance tests from Khronos

Impacted TCs num(designed): New 133, Update 0, Delete 0
Unit test Platform: [Andriod]
Unit test result summary: Pass 0, Fail 0, Blocked 0
Merge pull request #1074 from JianfengXu/xujf/webcl/basic

[webapi] Integrate WebCL conformance tests from Khronos