[PATCH] D151741: [Lex] Only warn on defining or undefining language-defined builtins

[Nathan Chancellor via Phabricator via cfe-commits]

nathanchance added a comment.

This patch cleared up all the warnings I reported, thank you for the fix!


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D151741/new/

https://reviews.llvm.org/D151741