spec: update hash of 0.15
spec: update hash of 0.15

projectatomic/osbs-client,DBuildService/osbs-client,bfontecc007/osbs-client,DBuildService/osbs-client,vrutkovs/osbs-client,jpopelka/osbs-client,projectatomic/osbs-client,jpopelka/osbs-client,vrutkovs/osbs-client,bfontecc007/osbs-client