add back common/support.h, forwarding to the correct header and giving a warning
add back common/support.h, forwarding to the correct header and giving a warning

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