Merge commit '96dd26cb92e1' from llvm.org/main into next

Author: git apple-llvm automerger

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

@@ -108,6 +108,7 @@ unittest("ClangdTests") {
     "SourceCodeTests.cpp",
     "StdLibTests.cpp",
     "SymbolCollectorTests.cpp",
+    "SymbolDocumentationTests.cpp",
     "SymbolInfoTests.cpp",
     "SyncAPI.cpp",
     "TUSchedulerTests.cpp",