[clang] [clang-tools-extra] [llvm] [clangd] Avoid bogus error about recursive inclusion (PR #95200)

[Nathan Ridge via cfe-commits]

HighCommander4 wrote:

This is @sam-mccall's patch from https://reviews.llvm.org/D78038, rebased and posted as a Github PR

https://github.com/llvm/llvm-project/pull/95200