Add Lintian overrides for liblxqt0.

debian/changelog

@@ -5,6 +5,7 @@ liblxqt (0.13.0-0ubuntu1) UNRELEASED; urgency=medium
   * Update copyright.
   * Run wrap-and-sort.
   * Update build and runtime dependencies.
+  * Update liblxqt0.install for the new release.
 
  -- Simon Quigley <tsimonq2@ubuntu.com>  Mon, 21 May 2018 22:14:31 -0500
 

debian/liblxqt0.install

@@ -1 +1,4 @@
+usr/bin/lxqt-backlight_backend
 usr/lib/*/liblxqt.so.*
+usr/share/lxqt/power.conf
+usr/share/polkit-1/actions/org.lxqt.backlight.pkexec.policy

debian/liblxqt0.lintian-overrides

@@ -0,0 +1,5 @@
+# lxqt-backlight_backend is a needed helper-application
+liblxqt0: application-in-library-section libs usr/bin/lxqt-backlight_backend
+
+# there will be no manpage for lxqt-backlight_backend
+liblxqt0: binary-without-manpage usr/bin/lxqt-backlight_backend