Even though libtracker-data uses types from libtracker-sparql, this
is the wrong way around. However, doing the right thing here still
breaks because meson is playing smart here and passes --no-undefined
for every shared library by default, so build breaks with obviously
undefined symbols.

Correct the dependency tree to be exactly how it was with autotools,
and override b_lundef when building libtracker-data to leave the
borrowed symbols undefined. The gaps will be filled in because
everyone must link with libtracker-sparql.

Closes: #44