Rename the uninstall scripts for contrib/lo and contrib/tsearch2 to

match the convention that foo's uninstall script is uninstall_foo.sql.
Also, stop installing lo_test.sql, which really ought to be made into
a regression test anyway (though it's unclear how to avoid a dependency
on the current OID counter...)

contrib/lo/uninstall_lo.sql

@@ -0,0 +1,15 @@
+--
+-- This removes the LO type
+-- It's used just for development
+--
+
+-- Adjust this setting to control where the objects get created.
+SET search_path = public;
+
+-- drop the type and associated functions
+DROP TYPE lo CASCADE;
+
+-- the trigger function has no dependency on the type, so drop separately
+DROP FUNCTION lo_manage();
+
+-- the lo stuff is now removed from the system