Attached is a patch to add other-window/frames version of the 
`find-library' command.

BTW, after I added the two new commands and rebuilt Emacs (with just 
`make'), I could not complete to them with `M-x find-library- TAB'.  I 
could only do this after loading the `find-func' library that contains 
them.  So I ran `make bootstrap' instead and then I could complete to 
them as expected.  I guess this means the autoloads had not been updated 
with just `make'... which command should I have run?  Bootstrapping 
takes awhile.