Set C++11 flags.
Set C++11 flags.

Note that C++11 support is required for the latest Chrono code.

tjolsen/chrono,rserban/chrono,jcmadsen/chrono,rserban/chrono,Bryan-Peterson/chrono,dariomangoni/chrono,dariomangoni/chrono,armanpazouki/chrono,andrewseidl/chrono,projectchrono/chrono,tjolsen/chrono,andrewseidl/chrono,amelmquist/chrono,projectchrono/chrono,tjolsen/chrono,jcmadsen/chrono,tjolsen/chrono,jcmadsen/chrono,rserban/chrono,Milad-Rakhsha/chrono,rserban/chrono,Milad-Rakhsha/chrono,Milad-Rakhsha/chrono,armanpazouki/chrono,projectchrono/chrono,amelmquist/chrono,amelmquist/chrono,Bryan-Peterson/chrono,amelmquist/chrono,projectchrono/chrono,rserban/chrono,jcmadsen/chrono,rserban/chrono,dariomangoni/chrono,Bryan-Peterson/chrono,Milad-Rakhsha/chrono,Milad-Rakhsha/chrono,armanpazouki/chrono,dariomangoni/chrono,tjolsen/chrono,dariomangoni/chrono,rserban/chrono,Bryan-Peterson/chrono,projectchrono/chrono,armanpazouki/chrono,jcmadsen/chrono,dariomangoni/chrono,andrewseidl/chrono,jcmadsen/chrono,armanpazouki/chrono,jcmadsen/chrono,andrewseidl/chrono,Bryan-Peterson/chrono,projectchrono/chrono,armanpazouki/chrono,amelmquist/chrono,Milad-Rakhsha/chrono,andrewseidl/chrono,amelmquist/chrono