Run css and canvas test of methanol from android-build

[2012/11/30 liuyq0307] Notes here.
[2012/12/03 liuyq0307] it works with /panda-jb-gcc47-tilt-stable-blob/#build=105, please see https://validation.linaro.org/lava-server/scheduler/job/40730
[2012/12/03 liuyq0307] test on JB4.2 needs to wait the deployment of latest lava-dispatcher source.
[2012/12/05 liuyq0307] css and canvas works with the stack browser on panda 4.2 JB stable build: https://android-build.linaro.org/builds/~linaro-android/panda-jb-gcc47-tilt-stable-blob/#build=132
[2012/12/05 liuyq0307] seems that chrome browser has some problem to run methanol test on panda stable 4.2 build
[2012/12/17 liuyq0307] css and canvas work on JB4.2 build: https://android-build.linaro.org/builds/~linaro-android/panda-jb-gcc47-tilt-stable-blob/#build=143
[2012/12/17 liuyq0307] will file bug when there are problems on origen and snowball

Meta:
Roadmap id: TBD
Headline: Integrated the css and canvas test of methanol to android-build
Acceptance: From android-build, we can run the css and canvas test of methanol and see the result

Work items:
Add the test to panda stable build and check the result (The css and canvas test works on panda-jb-gcc47-tilt-stable-blob - https://android-build.linaro.org/builds/~linaro-android/panda-jb-gcc47-tilt-stable-blob/#build=143): DONE