* 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
Putting information in external JSON files is IMHO not an improvement
over the idiomatic style of Nix expressions. The use of JSON doesn't
add anything over Nix expressions (in fact it removes expressive
power). And scattering package info over lots of little files makes
packages less readable over having the info in one file.
