Fixes output folder for the china light stemcell
Fixes output folder for the china light stemcell

We now specify an explicit output folder called `china-light-stemcell`
so we need our build to put the stemcell in that new folder

[#104220500](https://www.pivotaltracker.com/story/show/104220500)

Signed-off-by: Thinh Nguyen <381db031081d050934f1b36fa4ab3bf1b5383408@emc.com>

cloudfoundry-incubator/bosh-aws-cpi-release,cloudfoundry-incubator/bosh-aws-cpi-release,cloudfoundry-incubator/bosh-aws-cpi-release