more testing around create / call*

[jwasinger]

From @axic :

https://github.com/ewasm/tests/blob/wasm-tests/src/GeneralStateTestsFiller/stEWASMTests/createFiller.yml#L29
This is the culprit.
The only native create test we have creates a contract of 0 bytes.
The interface of creation is never tested properly, because apparently there is no need for tests.

[axic]

The same problem appears to be present with call*.