Bug#852138: theano 0.9 ready for upload

[Rebecca N. Palmer]

They have now said libgpuarray 0.6 for Theano 0.9 (i.e. what we 
currently have is fine) and libgpuarray 0.7 for Theano 0.10.

https://github.com/Theano/Theano/issues/6454
(#877316 is a separate problem.)