Move TLOF implementations to libCodegen to resolve layering violation.

llvm-svn: 96288
diff --git a/llvm/lib/Target/X86/X86TargetObjectFile.h b/llvm/lib/Target/X86/X86TargetObjectFile.h
index 0b5dec1..0fff194 100644
--- a/llvm/lib/Target/X86/X86TargetObjectFile.h
+++ b/llvm/lib/Target/X86/X86TargetObjectFile.h
@@ -10,6 +10,7 @@
 #ifndef LLVM_TARGET_X86_TARGETOBJECTFILE_H
 #define LLVM_TARGET_X86_TARGETOBJECTFILE_H
 
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Target/TargetLoweringObjectFile.h"