[gabi++] Fix incorrect function prototype for __gnu_unwind_frame.

Change-Id: I576b1829c4d19a24e40b273ea8989df738811d17
diff --git a/sources/cxx-stl/gabi++/src/helper_func_internal.cc b/sources/cxx-stl/gabi++/src/helper_func_internal.cc
index 0fbfcda..581b657 100644
--- a/sources/cxx-stl/gabi++/src/helper_func_internal.cc
+++ b/sources/cxx-stl/gabi++/src/helper_func_internal.cc
@@ -342,7 +342,8 @@
   }
 
   // lower-level runtime library API function that unwinds the frame
-  extern "C" bool __gnu_unwind_frame(_Unwind_Exception*, _Unwind_Context*);
+  extern "C" _Unwind_Reason_Code __gnu_unwind_frame(_Unwind_Exception*,
+                                                    _Unwind_Context*);
 
   void setRegisters(_Unwind_Exception* unwind_exception,
                     _Unwind_Context* context,