uselistorder: -mllvm -preserve-ll-use-list-order => -emit-llvm-uselists

Follow up to r234962, start respecting `-emit-llvm-uselists even for
LLVM assembly.  Note that the driver never passes this flag; this is
just a interface convenience/consistency for those using `-cc1`
directly.  This required LLVM r234969 (and predecessors).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@234970 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/BackendUtil.cpp

@@ -607,7 +607,8 @@ void EmitAssemblyHelper::EmitAssembly(BackendAction Action,
     break;
 
   case Backend_EmitLL:
-    getPerModulePasses()->add(createPrintModulePass(*OS));
+    getPerModulePasses()->add(
+        createPrintModulePass(*OS, "", CodeGenOpts.EmitLLVMUseLists));
     break;
 
   default: