[gn build] Port 3ed940a

Author: llvmgnsyncbot

llvm/utils/gn/secondary/clang-tools-extra/clang-tidy/hicpp/BUILD.gn

@@ -21,6 +21,7 @@ static_library("hicpp") {
   sources = [
     "ExceptionBaseclassCheck.cpp",
     "HICPPTidyModule.cpp",
+    "IgnoredRemoveResultCheck.cpp",
     "MultiwayPathsCoveredCheck.cpp",
     "NoAssemblerCheck.cpp",
     "SignedBitwiseCheck.cpp",