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
diff --git a/llvm/lib/ExecutionEngine/JIT/JIT.cpp b/llvm/lib/ExecutionEngine/JIT/JIT.cpp
index 022bd65..738b3a8 100644
--- a/llvm/lib/ExecutionEngine/JIT/JIT.cpp
+++ b/llvm/lib/ExecutionEngine/JIT/JIT.cpp
@@ -24,6 +24,7 @@
 #include "llvm/ExecutionEngine/GenericValue.h"
 #include "llvm/Support/MutexGuard.h"
 #include "llvm/System/DynamicLibrary.h"
+#include "llvm/Target/TargetData.h"
 #include "llvm/Target/TargetMachine.h"
 #include "llvm/Target/TargetJITInfo.h"
 #include <iostream>