If Qt is built without QtConcurrent, the relevant autotests should be
excluded from the build, rather than building empty tests that appear
to pass and thus produce confusing test results.
Change-Id: I43bafcb0ffa42e8981bec4e27bf6a23a28d86df9
Reviewed-on: http://codereview.qt-project.org/6395
Reviewed-by: Morten Johan Sørvig <morten.sorvig@nokia.com>
Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>