[CMake] ctest and tracks

[David Cole]

--track is the same as the TRACK argument to the ctest_start scripting 
command.

    http://www.cmake.org/cmake/help/v3.0/command/ctest_start.html

It will send a dashboard to the named section of a CDash project page, 
but it will NOT create it. You have to create the track (called a 
"group" in the CDash admin pages) as the CDash project admin first 
before you can send to it.

For example, on the VTK Wiki Examples dashboard, there is a "Wiki 
Examples" track/group/section, which was created by the project admin 
before dashboards were submitted to that track.

    http://open.cdash.org/index.php?project=VTKWikiExamples


HTH,
David C.