gn build: Merge r375390

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@375393 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/gn/secondary/lld/Common/BUILD.gn b/utils/gn/secondary/lld/Common/BUILD.gn
index 6f7e50b..a01696a 100644
--- a/utils/gn/secondary/lld/Common/BUILD.gn
+++ b/utils/gn/secondary/lld/Common/BUILD.gn
@@ -16,6 +16,7 @@
   ]
   sources = [
     "Args.cpp",
+    "DWARF.cpp",
     "ErrorHandler.cpp",
     "Filesystem.cpp",
     "Memory.cpp",