fix typo in compiler flag
Fix the last commit, it is still not the right syntax, I will simply remove the flag

even if it print a zillion compilation warning for valid C++11 code.
GCC 4.6 is just too old to compile SFLPhone-KDE anymore. I will make
sure it works until Ubuntu 14.04 is out, but then I will require 4.8.
cmake: use the kdepimlibs include dirs
Try to have less warnings on build.kde.org