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

llvm-svn: 206847
diff --git a/llvm/lib/Support/DataStream.cpp b/llvm/lib/Support/DataStream.cpp
index cb36d9c..eec8584 100644
--- a/llvm/lib/Support/DataStream.cpp
+++ b/llvm/lib/Support/DataStream.cpp
@@ -14,7 +14,6 @@
 //
 //===----------------------------------------------------------------------===//
 
-#define DEBUG_TYPE "Data-stream"
 #include "llvm/Support/DataStream.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/Support/FileSystem.h"
@@ -30,6 +29,8 @@
 #endif
 using namespace llvm;
 
+#define DEBUG_TYPE "Data-stream"
+
 // Interface goals:
 // * StreamableMemoryObject doesn't care about complexities like using
 //   threads/async callbacks to actually overlap download+compile