CMakeLists.txt: Set C++11 support simply.
CMakeLists.txt: Set C++11 support simply.

nanshe-org/rank_filter,DudLab/rank_filter,nanshe-org/rank_filter,jakirkham/rank_filter,jakirkham/rank_filter,nanshe-org/rank_filter,DudLab/rank_filter,DudLab/rank_filter,jakirkham/rank_filter