Log Message:
Update to 1.8.10:

NEW IN WAF 1.8.10
-----------------
* Replace cygwin paths in solution files - \ 
https://github.com/waf-project/waf/issues/1562
* Fixed the hcode in why.py - https://github.com/waf-project/waf/issues/1561
* Enabled execution from any folder: "waf configure --top=/arbitrary/folder \ 
--out=/tmp/build"
* Enabled stateless out-of-tree builds by default: "waf configure \ 
--no-lock-in-top --no-lock-in-run"
* Fixed the waf file generation on windows in Waf 1.8.9
* Add OS flags such as LDFLAGS only once - \ 
https://github.com/waf-project/waf/issues/1574
* Fixed conf.multicheck error handling