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

llvm-svn: 14663
diff --git a/llvm/lib/Analysis/DataStructure/DSCallSiteIterator.h b/llvm/lib/Analysis/DataStructure/DSCallSiteIterator.h
index df9f369..1fcbc03 100644
--- a/llvm/lib/Analysis/DataStructure/DSCallSiteIterator.h
+++ b/llvm/lib/Analysis/DataStructure/DSCallSiteIterator.h
@@ -16,7 +16,7 @@
 #ifndef DSCALLSITEITERATOR_H
 #define DSCALLSITEITERATOR_H
 
-#include "llvm/Analysis/DSGraph.h"
+#include "llvm/Analysis/DataStructure/DSGraph.h"
 #include "llvm/Function.h"
 
 namespace llvm {