Add alias required by ia64 unwind specification.

(Logical change 1.246)
diff --git a/src/unwind/GetDataRelBase.c b/src/unwind/GetDataRelBase.c
index 484aa31..cb60476 100644
--- a/src/unwind/GetDataRelBase.c
+++ b/src/unwind/GetDataRelBase.c
@@ -1,5 +1,5 @@
 /* libunwind - a platform-independent unwind library
-   Copyright (C) 2003 Hewlett-Packard Co
+   Copyright (C) 2003-2004 Hewlett-Packard Co
 	Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
 
 This file is part of libunwind.
@@ -34,3 +34,6 @@
   unw_get_proc_info (&context->cursor, &pi);
   return pi.gp;
 }
+
+unsigned long __libunwind_Unwind_GetDataRelBase (struct _Unwind_Context *)
+     ALIAS (_Unwind_GetDataRelBase);