[GitHub] Add teams for the inliner

[kazutakahirata]

No description provided.

[tstellar]

Hi, we are making some changes to the notification system, could you move these paths lists into .github/new-prs-labeler.yml. Use llvm:inliner for the label name in the file e.g.

llvm:inliner:
  - /path/1
  - /path2/

Also note that this new file uses minimatch glob parser which is different in some ways from the .gitignore syntax used by the CODEOWNERS file. The main difference is you need to do things like directory/** instead of directory/ to select a directory's contents.