[clangd] Fix toHalfOpenFileRange where start/end endpoints are in different files due to #include

Summary: https://github.com/clangd/clangd/issues/129

Reviewers: SureYeaah

Subscribers: ilya-biryukov, MaskRay, jkorous, arphaman, kadircet, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D66590

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@370029 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed