Recover some overzealously removed includes.

llvm-svn: 320648
diff --git a/llvm/lib/Target/X86/X86MacroFusion.cpp b/llvm/lib/Target/X86/X86MacroFusion.cpp
index 18b106f..67d95c2 100644
--- a/llvm/lib/Target/X86/X86MacroFusion.cpp
+++ b/llvm/lib/Target/X86/X86MacroFusion.cpp
@@ -12,6 +12,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "X86MacroFusion.h"
 #include "X86Subtarget.h"
 #include "llvm/CodeGen/MacroFusion.h"
 #include "llvm/CodeGen/TargetInstrInfo.h"