Add -std=c++11 flag to CMake recipe
Add -std=c++11 flag to CMake recipe

lukasz-m-maciejewski/xcpp,oalbe/xcpp,NobbZ/xcpp,exercism/xcpp,daniellehrner/xcpp,daniellehrner/xcpp,oalbe/xcpp,exercism/xcpp,patricksjackson/xcpp,NobbZ/xcpp,patricksjackson/xcpp,lukasz-m-maciejewski/xcpp