CMake: Move Release default to the top for Windows builds
CMake: Move Release default to the top for Windows builds

With Ninja/MSVC the build type would always default to Debug. After
moving it above the 'project' call it now also works here.

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

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