eagle: Update known-dists with eagle

Include the new Eagle release.

Change-Id: I932caabafbf25775daeeb248f74704c625da1af5
diff --git a/lintian/vendors/mendel/main/data/changes-file/known-dists b/lintian/vendors/mendel/main/data/changes-file/known-dists
index ca59f67..f06f0fa 100644
--- a/lintian/vendors/mendel/main/data/changes-file/known-dists
+++ b/lintian/vendors/mendel/main/data/changes-file/known-dists
@@ -4,4 +4,5 @@
 mendel-beaker
 mendel-chef
 mendel-day
+mendel-eagle
 unstable