[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

llvm/tools/llvm-extract/llvm-extract.cpp

@@ -12,12 +12,12 @@
 //
 //===----------------------------------------------------------------------===//
 
-#include "llvm/IR/LLVMContext.h"
 #include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/IR/PrintModulePass.h"
 #include "llvm/Bitcode/ReaderWriter.h"
 #include "llvm/IR/DataLayout.h"
+#include "llvm/IR/IRPrintingPasses.h"
+#include "llvm/IR/LLVMContext.h"
 #include "llvm/IR/Module.h"
 #include "llvm/IRReader/IRReader.h"
 #include "llvm/PassManager.h"