Debug Info: update testing cases to specify the debug info version number.

We are going to drop debug info without a version number or with a different
version number, to make sure we don't crash when we see bitcode files with
different debug info metadata format.

llvm-svn: 195504
diff --git a/llvm/test/DebugInfo/X86/stringpool.ll b/llvm/test/DebugInfo/X86/stringpool.ll
index 81ab8e6..fccac26 100644
--- a/llvm/test/DebugInfo/X86/stringpool.ll
+++ b/llvm/test/DebugInfo/X86/stringpool.ll
@@ -4,6 +4,7 @@
 @yyyy = common global i32 0, align 4
 
 !llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!9}
 
 !0 = metadata !{i32 786449, metadata !8, i32 12, metadata !"clang version 3.1 (trunk 143009)", i1 true, metadata !"", i32 0, metadata !1, metadata !1, metadata !1, metadata !3,  metadata !3, metadata !""} ; [ DW_TAG_compile_unit ]
 !1 = metadata !{i32 0}
@@ -39,3 +40,4 @@
 ; DARWIN-NEXT:        .byte   9                       ## DW_AT_location
 ; DARWIN-NEXT:        .byte   3
 ; DARWIN-NEXT:        .quad   _yyyy
+!9 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}