[gn build] Port 255cc202ea6

diff --git a/llvm/utils/gn/secondary/llvm/lib/Support/BUILD.gn b/llvm/utils/gn/secondary/llvm/lib/Support/BUILD.gn
index 33fac46..83440e6 100644 (file)
--- 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",