[patch][google gcc-4_8] Make AutoFDO and plugin based function layout work.

[Sriraman Tallam]

Google ref b/11631232

With AutoFDO, the .gnu.callgraph sections are not emitted with option
-freorder-functions=callgraph. This simple patch fixes it.

Index: final.c
===================================================================
--- final.c (revision 205418)
+++ final.c (working copy)
@@ -4471,7 +4471,7 @@
   /* With -fcallgraph-profiles-sections and -freorder-functions=,
      add ".gnu.callgraph.text" section for storing profiling information. */
   if ((flag_reorder_functions > 1)
-      && flag_profile_use
+      && (flag_profile_use || flag_auto_profile)
       && cgraph_get_node (current_function_decl) != NULL
       && ((cgraph_get_node (current_function_decl))->callees != NULL
   || (cgraph_get_node (current_function_decl))->count > 0))

Ok to commit?

Sri