* bindings/meson.build: Declare a dependency for JSC that includes both
  the lib, VAPI and appropriate build directory. Update WK dependencies
  to reflect the same that their pkg-config files currently do, sort.

* meson.build: Rename top-level JSC deps to make it clear what they are
  for.

* src/engine/meson.build: Depend on JSC rather than WK, sort deps.