[wrt]update tests.xml sh path for wrt-autodevice-tizen-tests

[Detailed commit message (if have)]
Impacted TCs num(approved): New 0, update 0, deleted 0
Unit test platform: [tizen]
Unit test result summary: Pass 14, Fail  0, Blocked 0
Merge pull request #498 from linshen/update-autodevice-tizen-test

[wrt]update tests.xml sh path for wrt-autodevice-tizen-tests