[Refactoring] Refactor `core.stdc.stdint`.
[Workaround] Add Issue 11173 workaround.

Issue URL: http://d.puremagic.com/issues/show_bug.cgi?id=11173
Merge pull request #516 from denis-sh/make-`core.stdc.stdint.typify`-public

Make `core.stdc.stdint.typify` public