Add bug links.

debian/changelog

@@ -1,7 +1,7 @@
 calamares-settings-ubuntu (4) UNRELEASED; urgency=medium
 
-  * Don't fail to install the system on BIOS systems.
-  * Remove the right live task.
+  * Don't fail to install the system on BIOS systems (LP: #1780875).
+  * Remove the right live task (LP: #1780585).
   * Enable GeoIP support by default, to get accurate timezone readings.
 
  -- Simon Quigley <tsimonq2@ubuntu.com>  Mon, 09 Jul 2018 17:51:16 -0500