spec file fixes - missing directories

This will fix spec file installations:

First:
Error in configuration file '/etc/icinga/icinga.cfg' - Line 465

Line 465:
check_result_path=/var/log/icinga/spool/checkresults
-----

Second:
Error: Could not create external command file '/var/log/icinga/rw/icinga.cmd' as named pipe: (2) -> No such file or directory.

Thanks to 'Ziben' - IssueID #106

icinga.spec

@@ -316,6 +316,9 @@ rm -rf $RPM_BUILD_ROOT
 %defattr(755,%{nsusr},%{nsgrp})
 %dir /var/log/icinga
 %dir /var/log/icinga/archives
+%dir /var/log/icinga/spool
+%dir /var/log/icinga/spool/checkresults
+%dir /var/log/icinga/rw
 %defattr(2775,%{nsusr},%{nsgrp})
 %dir /var/spool/icinga
 %doc Changelog INSTALLING LICENSE README UPGRADING