iostat: migrate to gentargets

Also make the cpu counting routine more reliable (for ARM it's
"Processor" in cpuinfo rather than "processor").

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
diff --git a/CHANGES b/CHANGES
index 9b2cb0c..b52aaa2 100644
--- a/CHANGES
+++ b/CHANGES
@@ -31,8 +31,8 @@
 	cdrkit, cmake, dash, dhcp, dialog, diffutils, distcc, dmalloc,
 	dnsmasq, dropbear, e2fsprogs, fbv, file, flex, fontconfig,
 	gawk, gmpc, gnuchess, gst-plugins-base, gst-plugins-good,
-	gstreamer, gzip, icu, intltool, ipsec-tools, iptables, iw,
-	libart, libcgi, libdrm, libfuse, libglib2, libgpg-error,
+	gstreamer, gzip, icu, intltool, iostat, ipsec-tools, iptables,
+	iw, libart, libcgi, libdrm, libfuse, libglib2, libgpg-error,
 	libidn, liblockfile, libpng, libsoup, lighttpd, links,
 	linux-fusion, lmbench, lrzsz, ltrace, make, midori,
 	module-init-tools, mplayer, mysql_client, nbd, ncurses, neon,