bucket location is not supported

Setting the location when creating a new bucket doesn't work:

#!/usr/bin/env python3
from gcloud import storage    
client = storage.Client(project='foo')
bucket = Bucket(client=client, name="bar")
bucket.location = "EU"
bucket.create()

The bucket is always created with the default US location .
Patching the properties before creating the bucket doesn't work either:

bucket._patch_property('LocationConstraint', "EU")