cfbot fails because v2 is a plain diff, and git am cannot apply it. Attached v3 is the same change made with git format-patch, plus a commit message. It applies to master and REL_16_STABLE through REL_19_STABLE.
One suggestion: EXPLAIN still shows "Inlining: true" in this case, since it only checks PGJIT_INLINE. Maybe the note should say so.