[PM] Simplify the interface exposed for IR printing passes.

Nothing was using the ability of the pass to delete the raw_ostream it
printed to, and nothing was trying to pass it a pointer to the
raw_ostream. Also, the function variant had a different order of
arguments from all of the others which was just really confusing. Now
the interface accepts a reference, doesn't offer to delete it, and uses
a consistent order. The implementation of the printing passes haven't
been updated with this simplification, this is just the API switch.

llvm-svn: 199044

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

@@ -272,7 +272,7 @@ int main(int argc, char **argv) {
   }
 
   if (OutputAssembly)
-    Passes.add(createPrintModulePass(&Out.os()));
+    Passes.add(createPrintModulePass(Out.os()));
   else if (Force || !CheckBitcodeOutputToConsole(Out.os(), true))
     Passes.add(createBitcodeWriterPass(Out.os()));