Adding lib directory for getopts change

git-svn-id: https://nagiosplug.svn.sourceforge.net/svnroot/nagiosplug/nagiosplug/trunk@308 f882894a-f735-0410-b71e-b25c423dba1c

Makefile.am

@@ -1,6 +1,6 @@
 ## Process this file with automake to produce Makefile.in
 
-SUBDIRS = plugins plugins-scripts
+SUBDIRS = lib plugins plugins-scripts
 
 EXTRA_DIST = REQUIREMENTS acconfig.h subst.in subst.sh Helper.pm	\
 contrib nagios-plugins.spec.in getloadavg.m4