correct go-log dep

...rkspace/src/github.com/ipfs/go-datastore/flatfs/flatfs.go

blocks/blockstore/blockstore.go

blocks/blockstore/write_cache.go

blocks/set/set.go

blockservice/blockservice.go

blockservice/test/blocks_test.go

cmd/ipfs/init.go

cmd/ipfs/main.go

cmd/ipfswatch/main.go

cmd/seccat/seccat.go

cmd/seccat/util.go

commands/command.go

commands/http/handler.go

commands/request.go

core/commands/files/files.go

core/commands/log.go

core/commands/pin.go

core/commands/refs.go

core/commands/root.go

core/commands/sysdiag.go