[wiki] [sites] build: small fix to test post-receive hook || Hiltjo Posthuma

[git]

commit 3ec218de31ec17c67e64acba72367659373487a8
Author: Hiltjo Posthuma <hil...@codemadness.org>
Date:   Wed Oct 17 18:22:10 2018 +0200

    build: small fix to test post-receive hook

diff --git a/build b/build
index 7a706a54..a0889cde 100755
--- a/build
+++ b/build
@@ -1 +1,2 @@
+#!/bin/sh
 find * -type d -exec sh -exc './build-page "$0" >$0/index.html' {} \;