Update devel/qbs and devel/qtcreator to 1.9,0 and 4.4.0 respectively

[tcberner]

Summary

• Now requires WebEngine for the html documentation
• Requires a work-around for 10.3, see [1]

[1] https://github.com/akrzemi1/Optional/issues/24

[adridg]

lgtm; we talked about the clang workaround for 10.3 on IRC, and I've built it on 10.3@amd64 successfully.

[adridg]

.. only comment I'd have is now we have designer, depending on webkit, and creator, depending on webengine and designer, so there's a bit of an overload of web-thingies being built for this port.