[Eva] use callsite for populate_funspec locations

tests/slicing/oracle/select_by_annot.0.res.oracle

tests/slicing/oracle/select_by_annot.1.res.oracle

tests/slicing/oracle/select_by_annot.10.res.oracle

tests/slicing/oracle/select_by_annot.11.res.oracle

tests/slicing/oracle/select_by_annot.12.res.oracle

tests/slicing/oracle/select_by_annot.13.res.oracle

tests/slicing/oracle/select_by_annot.14.res.oracle

tests/slicing/oracle/select_by_annot.2.res.oracle

tests/slicing/oracle/select_by_annot.3.res.oracle

tests/slicing/oracle/select_by_annot.4.res.oracle

tests/slicing/oracle/select_by_annot.5.res.oracle

tests/slicing/oracle/select_by_annot.6.res.oracle

tests/slicing/oracle/select_by_annot.7.res.oracle

tests/slicing/oracle/select_by_annot.8.res.oracle

tests/slicing/oracle/select_by_annot.9.res.oracle

tests/slicing/oracle/select_calls.0.res.oracle

tests/slicing/oracle/select_calls.1.res.oracle

tests/slicing/oracle/select_return.0.res.oracle

tests/slicing/oracle/select_return.1.res.oracle

tests/slicing/oracle/select_return.10.res.oracle