Add a test for a model with Reshape as the final layer

[thesps]

I added a very simple test model with a Reshape as the final layer. The only problem is... this works on both master branch and the PR #443 (ie either with or without repack_stream as the final operation in the myproject.cpp).

I don't know yet what's the significant difference wrt @jmduarte 's gist

[thesps]

Correction: the test fails on master branch for io_parallel but works with io_stream.
On #443 the test passes for both io_parallel and io_stream.