Fix dbconsole test when tempdir is a long path

The output of `.databases` in SQLite will truncate to a certain size.
This causes the test to fail when run locally from a mac, or anything
which has a tempdir with more than a few characters. This pragma has
the same output, but presented as a normal query, meaning no truncation
will occur.

railties/test/application/dbconsole_test.rb

@@ -64,7 +64,7 @@ def test_respect_environment_option
       spawn_dbconsole(slave, "-e production")
       assert_output("sqlite>", master)
 
-      master.puts ".databases"
+      master.puts "pragma database_list;"
       assert_output("production.sqlite3", master)
     ensure
       master.puts ".exit"