The change in 1b312602 added somewhat clumsy meson support. The
C-side vapi is now required by the Vala-side vapi, but only the latter
is included when building the rest of the libraries. Since we can't
tell the build to ditch the vala vapi and include our merged/spiced up
tracker-sparql-2.0.vapi file, add a dependency on the C vapi that we can
add on the selected places.

A side effect of including the unfixed vapis is that includes point
to internal files, so make sure everything gets TRACKER_COMPILATION
when building to circumvent it.