reorder the fields in DILexicalBlockFile to match the common prefix for DIScopes

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177754 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/IR/DIBuilder.cpp b/lib/IR/DIBuilder.cpp
index fe2176c..5602457 100644
--- a/lib/IR/DIBuilder.cpp
+++ b/lib/IR/DIBuilder.cpp
@@ -1007,8 +1007,8 @@
                                                      DIFile File) {
   Value *Elts[] = {
     GetTagConstant(VMContext, dwarf::DW_TAG_lexical_block),
-    Scope,
-    File
+    File,
+    Scope
   };
   DILexicalBlockFile R(MDNode::get(VMContext, Elts));
   assert(