release script: no tests & build docs
release script: no tests & build docs

* remove build_tests from all target for release tarballs
* run doxygen and store qch file and docs tarball

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

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