sim/erc32/sys.h: Include "config.h".

This file includes "gdb/callback.h", which includes "bfd.h", which
itself verifies that "config.h" was included earlier.

sim/erc32/ChangeLog:

        * sys.h: Include "config.h".

sim/erc32/ChangeLog

@@ -1,3 +1,7 @@
+2012-06-15  Joel Brobecker  <brobecker@adacore.com>
+
+	* sys.h: Include "config.h".
+
 2012-06-15  Joel Brobecker  <brobecker@adacore.com>
 
 	* config.in, configure: Regenerate.

sim/erc32/sis.h

@@ -20,6 +20,7 @@
  * 
  */
 
+#include "config.h"
 #include "ansidecl.h"
 #include "gdb/callback.h"
 #include "gdb/remote-sim.h"