[clang-tidy] use CHECK-NOTES in bugprone-unused-return-value

Reviewers: aaron.ballman, alexfh, hokein

Reviewed By: alexfh

Subscribers: xazax.hun, cfe-commits

Differential Revision: https://reviews.llvm.org/D52187

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@342468 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed