fix test

Author: joaosaffran

llvm/test/CodeGen/DirectX/ContainerData/RootSignature-RootDescriptor-Invalid-Flags.ll

@@ -13,6 +13,6 @@ attributes #0 = { "hlsl.numthreads"="1,1,1" "hlsl.shader"="compute" }
 
 
 !dx.rootsignatures = !{!2} ; list of function/root signature pairs
-!2 = !{ ptr @main, !3, i32 1 } ; function, root signature
+!2 = !{ ptr @main, !3, i32 2 } ; function, root signature
 !3 = !{ !5 } ; list of root signature elements
 !5 = !{ !"RootCBV", i32 0, i32 1, i32 2, i32 3  }