Add Object/Error.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133868 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Object/CMakeLists.txt b/lib/Object/CMakeLists.txt
index 703d385..e32940e 100644
--- a/lib/Object/CMakeLists.txt
+++ b/lib/Object/CMakeLists.txt
@@ -1,6 +1,7 @@
 add_llvm_library(LLVMObject
   COFFObjectFile.cpp
   ELFObjectFile.cpp
+  Error.cpp
   MachOObject.cpp
   MachOObjectFile.cpp
   Object.cpp