gn build: Merge 2054ed0

Author: llvmgnsyncbot

llvm/utils/gn/secondary/clang-tools-extra/clangd/unittests/BUILD.gn

@@ -37,6 +37,7 @@ unittest("ClangdTests") {
     "ClangdTests.cpp",
     "CodeCompleteTests.cpp",
     "CodeCompletionStringsTests.cpp",
+    "CollectMacrosTests.cpp",
     "ContextTests.cpp",
     "DexTests.cpp",
     "DiagnosticsTests.cpp",