Put the functionality for printing a value to a raw_ostream as an

operand into the Value interface just like the core print method is.
That gives a more conistent organization to the IR printing interfaces
-- they are all attached to the IR objects themselves. Also, update all
the users.

This removes the 'Writer.h' header which contained only a single function
declaration.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198836 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Analysis/ModuleDebugInfoPrinter.cpp

@@ -19,7 +19,6 @@
 #include "llvm/ADT/Statistic.h"
 #include "llvm/DebugInfo.h"
 #include "llvm/IR/Function.h"
-#include "llvm/IR/Writer.h"
 #include "llvm/Pass.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/raw_ostream.h"