setup-environment-internal: don't use 'repo rebase'
setup-environment-internal: don't use 'repo rebase'

'repo rebase' will update repos to tip of the branch ignoring locked
down revisions.

Signed-off-by: Koen Kooi <42e3d96910f922bdd7dd1805fe3f8aff634f391d@dominion.thruhere.net>
Angstrom-distribution/angstrom-manifest,96boards/oe-rpb-manifest,linaro-home/lhg-oe-manifests,twoerner/angstrom-manifest,ndechesne/qcom-oe-manifest