[INTERNAL] Use popcnt builtins for clang on windows
[INTERNAL] Use popcnt builtins for clang on windows

bestrauc/seqan,bestrauc/seqan,bestrauc/seqan,bestrauc/seqan,xenigmax/seqan,xenigmax/seqan,xenigmax/seqan,xenigmax/seqan,bestrauc/seqan,xenigmax/seqan,bestrauc/seqan,xenigmax/seqan,bestrauc/seqan,xenigmax/seqan,bestrauc/seqan,xenigmax/seqan