[C++, Build] Mantain compatibility with CMake 2.8.11.
[C++, Build] Mantain compatibility with CMake 2.8.11.

Change-Id: Ie6687313e0df69f3d1699db04b16ceed55f62406

bmwcarit/joynr,clive-jevons/joynr,bmwcarit/joynr,clive-jevons/joynr,clive-jevons/joynr,bmwcarit/joynr,bmwcarit/joynr,clive-jevons/joynr,clive-jevons/joynr,bmwcarit/joynr,clive-jevons/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr,bmwcarit/joynr