sh2: log user provided script alone
sh2: log user provided script alone

aside logging the whole sh2 wrapper code in every log file,
log user provided code on it's own, so it's more clear for user what he
was trying to run

Change-Id: I34a0fc38e85dd84c65a9d688b49c058c8f1ad395

pycontribs/powertape,pycontribs/powertape