Improve experience with perl bindings parser
Improve experience with perl bindings parser

This commit introduces the guaranteed generation of the 'generated'
directory. Previously, the script would return a success exit code and
not write anything in the files mentioned in the README.

florin-chelaru/urho,florin-chelaru/urho,florin-chelaru/urho,florin-chelaru/urho,florin-chelaru/urho,florin-chelaru/urho