Refactor a bunch of includes so that TargetMachine.h doesn't have to include

TargetData.h.  This should make recompiles a bit faster with my current
TargetData tinkering.

llvm-svn: 28238

llvm/lib/CodeGen/MachineFunction.cpp

@@ -20,6 +20,7 @@
 #include "llvm/CodeGen/MachineConstantPool.h"
 #include "llvm/CodeGen/MachineJumpTableInfo.h"
 #include "llvm/CodeGen/Passes.h"
+#include "llvm/Target/TargetData.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Target/TargetFrameInfo.h"
 #include "llvm/Function.h"