File iodine-fix-makefile-prefix.patch of Package iodine

diff -Naur a/Makefile b/Makefile
--- a/Makefile	2009-01-25 15:40:04.000000000 -0600
+++ b/Makefile	2012-09-06 09:02:31.056193204 -0500
@@ -1,4 +1,4 @@
-prefix?=/usr/local
+prefix=$(PREFIX)
 sbindir=$(prefix)/sbin
 datadir=$(prefix)/share
 mandir=$(datadir)/man