debian: add lintian-overrides for the Doxygen doc

* debian/source/lintian-overrides: New file.
* Makefile.am: Add it.

Makefile.am

@@ -53,6 +53,7 @@ DEBIAN =					\
   debian/python3-spot.install			\
   debian/rules					\
   debian/source/format				\
+  debian/source/lintian-overrides		\
   debian/spot-doc.doc-base			\
   debian/spot-doc.docs				\
   debian/spot-doc.install			\

debian/source/lintian-overrides

+# Doxygen copies some javascript inside the generated documentation,
+# but the source of that is already in the Doxygen package.
+spot source: source-is-missing doc/spot.html/*
+# These are extra javascript packages that trans.html currently depends
+# on.  But they should be removed eventually.
+spot source: source-is-missing python/ajax/js/jquery.*