fix allnoconfig build. the most useful fix of the month. ;)
[spotted by Bernhard Fischer <rep.nop@aon.at>]
diff --git a/applets/usage.c b/applets/usage.c
index d888fa9..bb7ca82 100644
--- a/applets/usage.c
+++ b/applets/usage.c
@@ -4,7 +4,7 @@
 #include "../include/autoconf.h"
 #include "../include/busybox.h"
 
-static const char usage_messages[] =
+static const char usage_messages[] = ""
 #define MAKE_USAGE
 #include "usage.h"
 #include "applets.h"