Rename CommandFlags.h -> CommandFlags.def

Since this isn't a real header - it includes static functions and had
external linkage variables (though this change makes them static, since
that's what they should be) so can't be included more than once in a
program.

llvm-svn: 319082
diff --git a/llvm/tools/lto/lto.cpp b/llvm/tools/lto/lto.cpp
index 1188521..e684398 100644
--- a/llvm/tools/lto/lto.cpp
+++ b/llvm/tools/lto/lto.cpp
@@ -15,7 +15,7 @@
 #include "llvm-c/lto.h"
 #include "llvm/ADT/STLExtras.h"
 #include "llvm/Bitcode/BitcodeReader.h"
-#include "llvm/CodeGen/CommandFlags.h"
+#include "llvm/CodeGen/CommandFlags.def"
 #include "llvm/IR/DiagnosticInfo.h"
 #include "llvm/IR/DiagnosticPrinter.h"
 #include "llvm/IR/LLVMContext.h"