update md-manystrings to use DXIL compatible metadata

this test checks that we can embed lots of string as metadata into DXIL
bitcode and retrieve it again

renaming the metadata to llvm.ident retains the testing with a DXIL
compatible metadata node

Author: inbelic

llvm/test/tools/dxil-dis/md-manystrings.ll

@@ -4,7 +4,7 @@
 
 target triple = "dxil-unknown-shadermodel6.7-library"
 
-!llvm.too_many_strings = !{!0, !1, !2, !3, !4, !5, !6, !7, !8, !9, !10, !11, !12, !13, !14, !15, !16, !17, !18, !19, !20, !21, !22, !23, !24, !25, !26, !27, !28, !29, !30, !31}
+!llvm.ident = !{!0, !1, !2, !3, !4, !5, !6, !7, !8, !9, !10, !11, !12, !13, !14, !15, !16, !17, !18, !19, !20, !21, !22, !23, !24, !25, !26, !27, !28, !29, !30, !31}
 
 !0 = !{!"String 0"}
 !1 = !{!"String 1"}
@@ -39,7 +39,7 @@ target triple = "dxil-unknown-shadermodel6.7-library"
 !30 = !{!"String 30"}
 !31 = !{!"String 31"}
 
-; CHECK: !llvm.too_many_strings = !{!0, !1, !2, !3, !4, !5, !6, !7, !8, !9, !10, !11, !12, !13, !14, !15, !16, !17, !18, !19, !20, !21, !22, !23, !24, !25, !26, !27, !28, !29, !30, !31}
+; CHECK: !llvm.ident = !{!0, !1, !2, !3, !4, !5, !6, !7, !8, !9, !10, !11, !12, !13, !14, !15, !16, !17, !18, !19, !20, !21, !22, !23, !24, !25, !26, !27, !28, !29, !30, !31}
 ; CHECK: !0 = !{!"String 0"}
 ; CHECK: !1 = !{!"String 1"}
 ; CHECK: !2 = !{!"String 2"}