[llvm-objcopy] Initial COFF support

This is an initial implementation of no-op passthrough copying of COFF
with objcopy.

Differential Revision: https://reviews.llvm.org/D54939

llvm-svn: 349605
diff --git a/llvm/tools/llvm-objcopy/CMakeLists.txt b/llvm/tools/llvm-objcopy/CMakeLists.txt
index afbf787..3b6c345 100644
--- a/llvm/tools/llvm-objcopy/CMakeLists.txt
+++ b/llvm/tools/llvm-objcopy/CMakeLists.txt
@@ -17,6 +17,9 @@
   Buffer.cpp
   CopyConfig.cpp
   llvm-objcopy.cpp
+  COFF/COFFObjcopy.cpp
+  COFF/Reader.cpp
+  COFF/Writer.cpp
   ELF/ELFObjcopy.cpp
   ELF/Object.cpp
   DEPENDS