[Eva] use callsite for populate_funspec locations

...iadic/tests/declared/oracle/typedefed_function.res.oracle

src/plugins/variadic/tests/known/oracle/exec.res.oracle

src/plugins/variadic/tests/known/oracle/fcntl.res.oracle

src/plugins/variadic/tests/known/oracle/open.res.oracle

...plugins/variadic/tests/known/oracle/open_wrong.res.oracle

src/plugins/variadic/tests/known/oracle/openat.res.oracle

src/plugins/variadic/tests/known/oracle/printf.res.oracle

...variadic/tests/known/oracle/printf_wrong_arity.res.oracle

...variadic/tests/known/oracle/printf_wrong_types.res.oracle

tests/builtins/oracle/imprecise.res.oracle

tests/constant_propagation/oracle/fct_ptr.res.oracle

tests/fc_script/make-wrapper.t/run.t

tests/float/oracle/alarms.0.res.oracle

tests/float/oracle/alarms.1.res.oracle

tests/float/oracle/alarms.2.res.oracle

tests/float/oracle/contract_special_float.1.res.oracle

tests/float/oracle/contract_special_float.2.res.oracle

tests/float/oracle/s.res.oracle

tests/impact/oracle/call.0.res.oracle

tests/impact/oracle/call.1.res.oracle