Modify unwind to comply with stack parser tools.

Bug: 14081592

Change-Id: I6906b2575c74d64f1c3ba7602779b3a789de1c69
diff --git a/runtime/runtime_linux.cc b/runtime/runtime_linux.cc
index da1b2ca..960d332 100644
--- a/runtime/runtime_linux.cc
+++ b/runtime/runtime_linux.cc
@@ -33,7 +33,7 @@
 
 struct Backtrace {
   void Dump(std::ostream& os) {
-    DumpNativeStack(os, GetTid(), "\t", true);
+    DumpNativeStack(os, GetTid(), "\t");
   }
 };