wget https://github.com/yocchi/emacs-clang-complete-async/commit/5ce197b15d7b8c9abfc862596bf8d902116c9efe.diff?full_index=1
echo 'Creating brew-patch.diff'
cat << EOF >> brew-patch.diff
--- a/src/completion.h	2013-05-26 17:27:46.000000000 +0200
+++ b/src/completion.h	2014-02-11 21:40:18.000000000 +0100
@@ -3,6 +3,7 @@


 #include <clang-c/Index.h>
+#include <stdio.h>


 typedef struct __completion_Session_struct
EOF