libsysprof-analyze: make summary augmentation optional

That way the descendant graphs can generate the self values but ignore the
summary augmentation (as that would mess up the generated values).

This fixes it so that showing the descendants tree keeps proper Total
and Self values.

src/libsysprof-analyze/sysprof-callgraph.c

@@ -329,6 +329,7 @@ sysprof_callgraph_add_traceable (SysprofCallgraph         *self,
     self->augment_func (self,
                         node,
                         SYSPROF_DOCUMENT_FRAME (traceable),
+                        TRUE,
                         self->augment_func_data);
 }