Fix bayou payload execution.

Bayou must link with its own ldscript to end up at a load address that
doesn't interfere with payloads. Make Bayou's ldscript MB compatible, so
the link with libpayload/lib/i386/head.o succeeds.

Signed-off-by: Ulf Jordan <jordan@chalmers.se>

Index: bayou/bayou.ldscript
===================================================================
--- bayou/bayou.ldscript	(revision 3737)
+++ bayou/bayou.ldscript	(arbetskopia)
@@ -60,6 +60,8 @@
 		*(.data.*)
 	}
 
+	_edata = .;
+
 	.bss : {
 		*(.bss)
 		*(.bss.*)