Properly set target/optimization options for thunks in free_lang_data

[Jan Hubicka]

Hi,
this patch updates free lang data to also set target/optimization flags for
thunks. This is because we eventually may produce a body for the thunk and it 
needs
to be compiled with correct settings.

Bootstrapped/regtested x86_64-linux, will commit it tomorrow.

Honza

        * tree.c (free_lang_data_in_decl): Also set target/optimization flags
        for thunks.
Index: tree.c
===================================================================
--- tree.c      (revision 236211)
+++ tree.c      (working copy)
@@ -5418,7 +5418,7 @@ free_lang_data_in_decl (tree decl)
              DECL_INITIAL (decl) = error_mark_node;
            }
        }
-      if (gimple_has_body_p (decl))
+      if (gimple_has_body_p (decl) || (node && node->thunk.thunk_p))
        {
          tree t;