Merge topic 'update-kwsys'

ec13bd5230 Tests: Disable test that builds KWSys if not also building CMake
ded4bc136e Merge branch 'upstream-KWSys' into update-kwsys
f3999a21c8 KWSys 2019-02-12 (44676809)

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2953