Mistake in automake version - back to 1.8

git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@1035 f882894a-f735-0410-b71e-b25c423dba1c

doc/developer-guidelines.sgml

@@ -110,7 +110,7 @@
 
 	<literallayout>
 	gnu make 3.79
-	automake 1.8.3
+	automake 1.8
 	autoconf 2.58
 	gettext 0.11.5
 	</literallayout>