Make Eina amalgamation build again

The eina_thread_init and eina_thread_shutdown functions
  have to return Eina_Bool to match other init/shutdown
  functions in Eina.  The fact that this didn't break the
  normal build is interesting...



SVN revision: 78258

legacy/eina/src/lib/eina_thread.c

@@ -300,12 +300,14 @@ eina_thread_join(Eina_Thread t)
    return PHJ(t);
 }
 
-void
+Eina_Bool
 eina_thread_init(void)
 {
+  return EINA_TRUE;
 }
 
-void
+Eina_Bool
 eina_thread_shutdown(void)
 {
+  return EINA_TRUE;
 }