[gn build] Port 255cc20

llvmgnsyncbot · llvmgnsyncbot · commit c88a567279ac · 2020-04-13T20:31:14.000Z
diff --git a/llvm/utils/gn/secondary/llvm/lib/Support/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Support/BUILD.gn
@@ -69,6 +69,7 @@ static_library("Support") {
     "ELFAttributes.cpp",
     "Error.cpp",
     "ErrorHandling.cpp",
+    "ExtensibleRTTI.cpp",
     "FileCheck.cpp",
     "FileCollector.cpp",
     "FileOutputBuffer.cpp",
