Add trampoline symbols to native debug info.

The debugger needs them to unwind through the trampolines and to
understand what is happening in the call stack.

Change-Id: Ia554058c3796788adcd7336d620a7734eb366905
diff --git a/compiler/oat_writer.h b/compiler/oat_writer.h
index 74aab4e..5e7a4a3 100644
--- a/compiler/oat_writer.h
+++ b/compiler/oat_writer.h
@@ -202,6 +202,10 @@
 
   ~OatWriter();
 
+  void AddMethodDebugInfos(const std::vector<debug::MethodDebugInfo>& infos) {
+    method_info_.insert(method_info_.end(), infos.begin(), infos.end());
+  }
+
   ArrayRef<const debug::MethodDebugInfo> GetMethodDebugInfo() const {
     return ArrayRef<const debug::MethodDebugInfo>(method_info_);
   }