canonicalize: Avoid a false-positive cycle failure.

canonicalize: Avoid a false-positive cycle failure.

* modules/canonicalize (Depends-on): Add file-set and hash-triple.  Sort.
Remove cycle-check.
* lib/canonicalize.c: Include file-set.h and hash-triple.h, not cycle-check.h.
(seen_triple): New function.
(canonicalize_filename_mode): Use it instead of cycle-check.
* tests/test-canonicalize.c: Add a test for this bug.
* tests/test-canonicalize.sh: Set up and run the test.