[clangd] Set thread priority on Windows
[clangd] Set thread priority on Windows

Reviewers: kadircet, gribozavr

Reviewed By: kadircet, gribozavr

Subscribers: ioeric, MaskRay, jkorous, arphaman, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D58683

git-svn-id: a34e9779ed74578ad5922b3306b3d80a0c825546@354957 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra,llvm-mirror/clang-tools-extra