Change uses of std::cerr/std::cout to llvm::Lcerr/llvm::cout, and remove
#include<iostream>.

Patch provided by Sam Bishop.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@45962 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/AST/StmtViz.cpp b/AST/StmtViz.cpp
index db2703c..51d514b 100644
--- a/AST/StmtViz.cpp
+++ b/AST/StmtViz.cpp
@@ -14,7 +14,6 @@
 
 #include "clang/AST/StmtGraphTraits.h"
 #include "llvm/Support/GraphWriter.h"
-#include <iostream>
 #include <sstream>
 
 using namespace clang;
@@ -23,7 +22,7 @@
 #ifndef NDEBUG
   llvm::ViewGraph(this,"AST");
 #else
-  std::cerr << "Stmt::viewAST is only available in debug builds on "
+  llvm::cerr << "Stmt::viewAST is only available in debug builds on "
   << "systems with Graphviz or gv!\n";
 #endif
 }