let doxygen think all those namespace macros only open/close the Vc namespace
let doxygen think all those namespace macros only open/close the Vc namespace

VcDevel/Vc,chr-engwer/Vc,VcDevel/Vc,VcDevel/Vc,chr-engwer/Vc,VcDevel/Vc,chr-engwer/Vc