define new macros VC_DEFAULT_IMPL_* to really mean the default impl namespace
define new macros VC_DEFAULT_IMPL_* to really mean the default impl namespace

The old macros meaning got inflated. I will have to clean it up later.

Signed-off-by: Matthias Kretz <372ea4eca737a13cd010ee806d4ce7b98ee71550@kde.org>

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