Log Message:
Updated waf to 1.9.5.

NEW IN WAF 1.9.5
----------------
* Fix the command-line option for the python executable (--python -> \ 
--pythondir) #1812
* Add support for older PyQt4 bindings #1813
* Expand properly `--xyz=${VAR}` when `shell=False` #1814
* Add qt5 5.7.x new libraries to qt5 tool #1815
* Add install_user and install_group to bld.install/bld.install_as/bld.symlink_as
* Reduce unnecesary build outputs verbosity #1819 #1828
* Prevent broken console encoding settings from causing additional failures #1823
* Let "waf --zones=argfile" display @argfile contents