[Dive] Fix callstack computation for dependencies

src/plugins/dive/Makefile.in

src/plugins/dive/build.ml

src/plugins/dive/callstack.ml

src/plugins/dive/callstack.mli

src/plugins/dive/tests/dive/oracle/assigned_param.dot

src/plugins/dive/tests/dive/oracle/const.dot

src/plugins/dive/tests/dive/oracle/pointed_param.dot

src/plugins/dive/tests/dive/oracle/pointers_to_local.dot

...ugins/dive/tests/dive/oracle/pointers_to_local.res.oracle

src/plugins/dive/tests/dive/oracle/unfocused_callers.dot

src/plugins/dive/tests/dive/oracle/various.dot

src/plugins/dive/tests/dive/oracle/various.res.oracle

src/plugins/dive/tests/dive/pointers_to_local.i

src/plugins/dive/tests/dive/various.i