setup-environment-internal: fix weston image name
setup-environment-internal: fix weston image name

Change-Id: Ia9851b5ee2e6a44ccade01e504b1c0d363011610
Signed-off-by: Zoltan Kuscsik <557cba61231509d70fbac0f1eb5a4bff058a651e@linaro.org>

96boards/oe-rpb-manifest,ndechesne/qcom-oe-manifest