Build: minor tweaks to make buildbot happy

Don't use % macro in specfile comments, header files shouldn't be
executable, and add rpmlint exception for systemd detection heuristic.

Author: kgaillot

lib/ais/plugin.h

@@ -79,8 +79,8 @@
 
 # Definitions for backward compatibility with older RPM versions
 
-## Ensure %license macro behaves consistently (older RPM will otherwise
-## overwrite %license once it encounters "License:"). Courtesy Jason Tibbitts:
+## Ensure the license macro behaves consistently (older RPM will otherwise
+## overwrite it once it encounters "License:"). Courtesy Jason Tibbitts:
 ## https://pkgs.fedoraproject.org/cgit/rpms/epel-rpm-macros.git/tree/macros.zzz-epel?h=el6&id=e1adcb77
 %if !%{defined _licensedir}
 %define description %{lua:

pacemaker.spec.in

@@ -9,7 +9,10 @@ addFilter("mixed-use-of-spaces-and-tabs")
 addFilter("W: only-non-binary-in-usr-lib")
 addFilter("E: hardcoded-library-path in /usr/lib/ocf")
 
-# Its there but rpmlint can't find it for some reason
+# Common location used to guess systemd presence
+addFilter("E: hardcoded-library-path in /usr/lib/os-release")
+
+# It's there but rpmlint can't find it for some reason
 addFilter("no-status-entry /etc/rc.d/init.d/")
 
 # We don't want the cluster to start by default