Configure info-look.el to recognize Tramp symbols

* lisp/net/tramp-integration.el (info-lookup->cache)
(info-lookup->mode-value, info-lookup->other-modes)
(info-lookup->topic-value, info-lookup-maybe-add-help)
(info-lookup-cache): Declare.
(info-look): Configure info-look.el to recognize Tramp symbols.
1 job for master in 56 minutes (queued for 3 seconds)
Status Job ID Name Coverage
  Test
failed #4443
test-all

00:56:00

 
Name Stage Failure
failed
test-all Test
Makefile:319: recipe for target 'check-doit' failed
make[2]: Leaving directory '/builds/emacs/emacs/test'
make[2]: *** [check-doit] Error 1
make[1]: *** [check-expensive] Error 2
Makefile:294: recipe for target 'check-expensive' failed
make[1]: Leaving directory '/builds/emacs/emacs/test'
Makefile:959: recipe for target 'check-expensive' failed
make: *** [check-expensive] Error 2
ERROR: Job failed: exit code 1