Change debug output to use stream version of debug.

df757e30f816bee8bed5f65ff8e63cec57fe46b1 may have fixed this for one platform,
but different platforms appear to have different ideas on what constitutes a FD.

Just use the stream operator to avoid having to face this nightmare all the
time.

Change-Id: I298c5a4b31e8a4af6b613d039cb9aee6e8263b5a
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>
Reviewed-by: Richard J. Moore <rich@kde.org>
qdoc: Now lists variable in namespaces

qdoc never did list variables declared in a namespace. It was
probably an oversight, because there are currently no uses of
the \variable command in namespaces. But recently a developer
tried to use \variable to document a namespace variable, and
it didn't work. This update corrects that problem.

Task-number: QTBUG-38734
Change-Id: I47b6234f2bafbb73dfb755a2ad82c9596a4489b1
Reviewed-by: Jørgen Lind <jorgen.lind@digia.com>
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>