Move all of the DSA headers into the Analysis/DataStructure subdir.

llvm-svn: 14663
diff --git a/llvm/lib/Analysis/DataStructure/Steensgaard.cpp b/llvm/lib/Analysis/DataStructure/Steensgaard.cpp
index 51d6134..5b055dc 100644
--- a/llvm/lib/Analysis/DataStructure/Steensgaard.cpp
+++ b/llvm/lib/Analysis/DataStructure/Steensgaard.cpp
@@ -14,8 +14,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/Analysis/DataStructure.h"
-#include "llvm/Analysis/DSGraph.h"
+#include "llvm/Analysis/DataStructure/DataStructure.h"
+#include "llvm/Analysis/DataStructure/DSGraph.h"
 #include "llvm/Analysis/AliasAnalysis.h"
 #include "llvm/Module.h"
 #include "Support/Debug.h"