Fix quoting bug introduced by commit 74de7aef

Signed-off-by: Wolfgang Denk <wd@denx.de>
diff --git a/common/cmd_load.c b/common/cmd_load.c
index d5eaac7..2b5a66d 100644
--- a/common/cmd_load.c
+++ b/common/cmd_load.c
@@ -518,7 +518,7 @@
 		char *s;
 
 		if (((s = getenv("autoscript")) != NULL) && (strcmp(s,"yes") == 0)) {
-			printf ("Running "source" command at addr 0x%08lX",
+			printf ("Running \"source\" command at addr 0x%08lX",
 				load_addr);
 
 			s = getenv ("autoscript_uname");