Now, libtracker-sparql includes tracker-version.h and tracker-sparql.h is a
real non-generated header which includews the generated vala headers.

We need to wrap the generated headers from valac to include checks ensuring
the generated header is not included directly, but rather the on header
for the entire library is included instead (tracker-sparql.h)

So now we have -generated-no-checks.h from valac, and all -generated-no-checks.h
files get converted to -generated.h with the pre-processor additions inserted

Fixes GB#646365, Add macro to check Tracker version