Log Message:
waf: update to 2.0.8.

NEW IN WAF 2.0.8
----------------
* Improve Windows console encoding outputs on Python 3.6 and Japanese code page #2163
* Improve msvc detection on Python 3.6 and Japanese code page #2155
* Improve moc/rcc flag parsing with msvc #2169
* Improve Eclipse project generation #2166 #2165 #2164 #2149 #2145
* Improve Boost project detection on dpkg-based systems #2146