gn build: Merge r350893

llvm-svn: 350894

Author: nico

llvm/utils/gn/secondary/llvm/tools/llvm-objcopy/BUILD.gn

@@ -50,6 +50,7 @@ executable("llvm-objcopy") {
  sources = [
  "Buffer.cpp",
  "COFF/COFFObjcopy.cpp",
+ "COFF/Object.cpp",
  "COFF/Reader.cpp",
  "COFF/Writer.cpp",
  "CopyConfig.cpp",