package/iostat: fix upstream source URL

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
(cherry picked from commit 3d37cc2c97ddfd89698af121e77e9cebfb085a16)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/iostat/iostat.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 IOSTAT_VERSION = 2.2
-IOSTAT_SITE = http://www.linuxinsight.com/files
+IOSTAT_SITE = http://linuxinsight.com/sites/default/files
 IOSTAT_LICENSE = GPL
 IOSTAT_LICENSE_FILES = LICENSE