Storage: upload_* does not send properties (need an extra patch)

Not able to set `cache-control` while uploading blobs. I tried this.

```
foo_blob = bucket.blob('sample.txt')
foo_blob.cache_control = 3600
foo_blob.content_type = 'text/plain'
foo_blob.upload_from_string('Sample Text')
```

 But after uploading the property `foo_blob.cache_control` gets set to `None` again.
