This patch try to support following way:

#+begin_src sh :results link :file "/tmp/test.txt"
echo "hello" > /tmp/test.txt
echo "test"
#+end_src

#+RESULTS:
[[file:/tmp/test.txt]]

Because:

- ~org-babel-execute-src-block~
  - ~(org-babel-get-src-block-info)~
    - (let* ((info .. (apply #'org-babel-merge-params ...))))
      - ~org-babel-merge-params~
        - [ ] *because* code ~(`(,(or :file :file-ext) . ,value) ...)~
          lines logic in function ~org-babel-get-src-block-info~, it
          merge "file" ~:results~, so override params plist :results
          value ~link~.
        - [ ] So I put ~link~ and ~graphics~ "~:results~" type into a
          separate group in constant
          ~org-babel-common-header-args-w-values~.

If anybody has better way, please improve my code.