ART: Fix internal addr2line

Test: m test-art-host
Change-Id: I555a196577eeef995746b6292a4728c4814f0875
diff --git a/runtime/native_stack_dump.cc b/runtime/native_stack_dump.cc
index 10f5898..88adad0 100644
--- a/runtime/native_stack_dump.cc
+++ b/runtime/native_stack_dump.cc
@@ -373,7 +373,7 @@
     }
     os << std::endl;
     if (try_addr2line && use_addr2line) {
-      Addr2line(it->map.name, it->pc - it->map.start, os, prefix, &addr2line_state);
+      Addr2line(it->map.name, it->rel_pc, os, prefix, &addr2line_state);
     }
   }