interbench: add forgotten patch.

srcpkgs/interbench/patches/musl-compat.patch

@@ -0,0 +1,24 @@
+From 51af4ea4127af66e50477e65d6fa9b29cde8dcfb Mon Sep 17 00:00:00 2001
+From: Andrea Brancaleoni <miwaxe@gmail.com>
+Date: Mon, 24 Oct 2016 11:18:33 +0200
+Subject: [PATCH] musl compat
+
+---
+ interbench.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/interbench.c b/interbench.c
+index 10b22b1..47c4227 100644
+--- a/interbench.c
++++ b/interbench.c
+@@ -45,6 +45,7 @@
+ #include <sys/types.h>
+ #include <sys/mman.h>
+ #include <sys/wait.h>
++#include <sys/stat.h>
+ #include "interbench.h"
+ 
+ #define MAX_UNAME_LENGTH	100
+-- 
+2.10.1
+