* Add setupHook for meson/ninja build
* libhttpseverywhere: Use meson/ninja setupHooks
* jamomacore: Remove superfluous ninja buildInput
* Remove obsolete ninja buildPhases
These are all handled by ninja's setup hook.
* lean2, xcbuild: fix build with ninja setup hook
Ninja is a runtime dependency here. However, cmake can generate Ninja
build files as well to satisfy the setup hook.
* qtwebengine: fix build with ninja setup hook
