BUILD: wurfl: wurfl.c needs tools.h
It calls memprintf() which is defined there but used to inherit it
through others.
diff --git a/addons/wurfl/wurfl.c b/addons/wurfl/wurfl.c
index e9780e4..4df6473 100644
--- a/addons/wurfl/wurfl.c
+++ b/addons/wurfl/wurfl.c
@@ -1,6 +1,9 @@
#include <stdio.h>
#include <stdarg.h>
+#include <import/ebmbtree.h>
+#include <import/ebsttree.h>
+
#include <haproxy/api.h>
#include <haproxy/arg.h>
#include <haproxy/buf-t.h>
@@ -13,8 +16,7 @@
#include <haproxy/http_htx.h>
#include <haproxy/log.h>
#include <haproxy/sample.h>
-#include <import/ebmbtree.h>
-#include <import/ebsttree.h>
+#include <haproxy/tools.h>
#include <wurfl/wurfl.h>