Updated runtime files.
updated for version 7.4.414
Problem:    Cannot define a command only when it's used.
Solution:   Add the CmdUndefined autocommand event. (partly by Yasuhiro
	    Matsumoto)
Added tag v7-4-414 for changeset 67edf731a240
updated for version 7.4.415
Problem:    Cannot build.  Warning for shadowed variable. (John Little)
Solution:   Add missing change.  Remove declaration.
Added tag v7-4-415 for changeset 20dbceb6f471
Update version number to 7.4.415
Runtime file updates.