ciao-launcher: move osprepare call to helper
ciao-launcher: move osprepare call to helper

This is meant to avoid gocyclo being unhappy.  It probably ought to include
an explicit unit test, though that travis CI runs (after we start relying on
osprepare to install things instead of the travis.yml) would also be a good
proof point.

Signed-off-by: Tim Pepper <8dbd764830e941d092a1cb7fa16423169acc0b04@linux.intel.com>

erick0z/ciao,tpepper/ciao,leoswaldo/ciao,matthewrsj/ciao,obedmr/ciao,mrkz/ciao,mrkz/ciao,ciao-project/ciao,jorgevgut/ciao,jorgevgut/ciao,leoswaldo/ciao,01org/ciao,obedmr/ciao,mcastelino/ciao,wcwxyz/ciao,erick0z/ciao,jorgevgut/ciao,markdryan/ciao,mcastelino/ciao,tpepper/ciao,kaccardi/ciao,01org/ciao,markdryan/ciao,tpepper/ciao,kaccardi/ciao,ciao-project/ciao,matthewrsj/ciao,mrkz/ciao,rbradford/ciao,leoswaldo/ciao,mcastelino/ciao,erick0z/ciao,matthewrsj/ciao,obedmr/ciao,wcwxyz/ciao,wcwxyz/ciao,rbradford/ciao