PR14606: debug info imported_module support

Adding another CU-wide list, in this case of imported_modules (since they
should be relatively rare, it seemed better to add a list where each element
had a "context" value, rather than add a (usually empty) list to every scope).
This takes care of DW_TAG_imported_module, but to fully address PR14606 we'll
need to expand this to cover DW_TAG_imported_declaration too.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179836 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/DebugInfo/array.ll b/test/DebugInfo/array.ll
index 3077110..7dd57d7 100644
--- a/test/DebugInfo/array.ll
+++ b/test/DebugInfo/array.ll
@@ -16,7 +16,7 @@
 
 !0 = metadata !{i32 786478, metadata !1, metadata !"main", metadata !"main", metadata !"", metadata !1, i32 3, metadata !3, i1 false, i1 true, i32 0, i32 0, i32 0, i32 0, i1 false, i32 ()* @main, null, null, null, i32 3} ; [ DW_TAG_subprogram ]
 !1 = metadata !{i32 786473, metadata !14} ; [ DW_TAG_file_type ]
-!2 = metadata !{i32 786449, metadata !1, i32 12, metadata !"clang version 3.0 (trunk 129138)", i1 false, metadata !"", i32 0, null, null, metadata !13, null, null} ; [ DW_TAG_compile_unit ]
+!2 = metadata !{i32 786449, metadata !1, i32 12, metadata !"clang version 3.0 (trunk 129138)", i1 false, metadata !"", i32 0, null, null, metadata !13, null,  null, null} ; [ DW_TAG_compile_unit ]
 !3 = metadata !{i32 786453, metadata !1, metadata !"", metadata !1, i32 0, i64 0, i64 0, i32 0, i32 0, i32 0, metadata !4, i32 0, i32 0} ; [ DW_TAG_subroutine_type ]
 !4 = metadata !{metadata !5}
 !5 = metadata !{i32 786468, metadata !2, metadata !"int", null, i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ]