Inspector scripts are not compatible with Python v3
https://bugs.webkit.org/show_bug.cgi?id=127128

Reviewed by Benjamin Poulain.

* inspector/scripts/generate-combined-inspector-json.py: Turn print statements into print function calls.
* inspector/scripts/jsmin.py: Try importing the StringIO class from the StringIO module (which will work for
Python v2) or, on import error, import the class from the io module (which will work for Python v3).


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@162250 268f45cc-cd09-0410-ab3c-d52691b4dbfc