[meson] Run check-symbols.sh and check-static-inits.sh correctly * Search src/ build directory for objects in check-static-inits.sh * Find .def files in src/ build directory in src/check-symbols.sh * Pass builddir also in autotools also, we may just remove libs passing after autotools removal * Move harfbuzz_subset_def target so can be referenced as a check-static-inits.sh dependency