[Modules] Fix potential ODR violations by sinking the DEBUG_TYPE
definition below all of the header #include lines, clang edition.

If you want more details about this, you can see some of the commits to
Debug.h in LLVM recently. This is just the clang section of a cleanup
I've done for all uses of DEBUG_TYPE in LLVM.

llvm-svn: 206849
diff --git a/clang/lib/Format/Format.cpp b/clang/lib/Format/Format.cpp
index 92b9855..3544cff 100644
--- a/clang/lib/Format/Format.cpp
+++ b/clang/lib/Format/Format.cpp
@@ -13,8 +13,6 @@
 ///
 //===----------------------------------------------------------------------===//
 
-#define DEBUG_TYPE "format-formatter"
-
 #include "ContinuationIndenter.h"
 #include "TokenAnnotator.h"
 #include "UnwrappedLineParser.h"
@@ -31,6 +29,8 @@
 #include <queue>
 #include <string>
 
+#define DEBUG_TYPE "format-formatter"
+
 using clang::format::FormatStyle;
 
 LLVM_YAML_IS_FLOW_SEQUENCE_VECTOR(std::string)