Added HTTP scheme to doc/examples for gsutil setcors command
Added HTTP scheme to doc/examples for gsutil setcors command


mattdr/gsutil,GoogleCloudPlatform/gsutil,GoogleCloudPlatform/gsutil,dimfeld/gsutil,ttiurani/gsutil,chriskuehl/gsutil-debian,dtjackson/gsutil,fishjord/gsutil,craigcitro/gsutil,BrandonY/gsutil