Add #include no longer included by llvm/Transforms/Scalar/ConstantProp.h

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2517 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Scalar/SCCP.cpp

@@ -18,6 +18,7 @@
 #include "llvm/Transforms/Scalar/ConstantProp.h"
 #include "llvm/ConstantHandling.h"
 #include "llvm/Function.h"
+#include "llvm/BasicBlock.h"
 #include "llvm/iPHINode.h"
 #include "llvm/iMemory.h"
 #include "llvm/iTerminators.h"