ciao-launcher: In qmpAttach/Detach ensure error is propagated
ciao-launcher: In qmpAttach/Detach ensure error is propagated

The err value was being inadvertently shadowed resulting in the error
not being correctly propagated along the channel if the nested code
failed.

Signed-off-by: Rob Bradford <c49e1dc14cd52e2644816db47123896e0ac79025@intel.com>

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