[PM] Rename the IR printing pass header to a more generic and correct
name to match the source file which I got earlier. Update the include
sites. Also modernize the comments in the header to use the more
recommended doxygen style.

llvm-svn: 199041
diff --git a/llvm/lib/Target/CppBackend/CPPBackend.cpp b/llvm/lib/Target/CppBackend/CPPBackend.cpp
index 492b194..6e2dd0a 100644
--- a/llvm/lib/Target/CppBackend/CPPBackend.cpp
+++ b/llvm/lib/Target/CppBackend/CPPBackend.cpp
@@ -1924,11 +1924,11 @@
   Out << "#include <llvm/IR/DerivedTypes.h>\n";
   Out << "#include <llvm/IR/Function.h>\n";
   Out << "#include <llvm/IR/GlobalVariable.h>\n";
+  Out << "#include <llvm/IR/IRPrintingPasses.h>\n";
   Out << "#include <llvm/IR/InlineAsm.h>\n";
   Out << "#include <llvm/IR/Instructions.h>\n";
   Out << "#include <llvm/IR/LLVMContext.h>\n";
   Out << "#include <llvm/IR/Module.h>\n";
-  Out << "#include <llvm/IR/PrintModulePass.h>\n";
   Out << "#include <llvm/Support/FormattedStream.h>\n";
   Out << "#include <llvm/Support/MathExtras.h>\n";
   Out << "#include <algorithm>\n";