Registry.h should not depend on CommandLine.h.

Split Support/Registry.h into two files so that we have less to
recompile every time CommandLine.h is changed.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62312 91177308-0d34-0410-b5e6-96231b3b80d8

lib/ExecutionEngine/JIT/TargetSelect.cpp

@@ -15,6 +15,7 @@
 #include "JIT.h"
 #include "llvm/Module.h"
 #include "llvm/ModuleProvider.h"
+#include "llvm/Support/RegistryParser.h"
 #include "llvm/Support/Streams.h"
 #include "llvm/Target/SubtargetFeature.h"
 #include "llvm/Target/TargetMachine.h"
@@ -22,7 +23,7 @@
 using namespace llvm;
 
 static cl::opt<const TargetMachineRegistry::entry*, false,
-               TargetMachineRegistry::Parser>
+               RegistryParser<TargetMachine> >
 MArch("march", cl::desc("Architecture to generate assembly for:"));
 
 static cl::opt<std::string>