Added newline at end of test file

Author: smada3

mlir/test/Target/LLVMIR/nvvmir-invalid.mlir

@@ -571,4 +571,4 @@ llvm.func @nvvm_mma_m16n8k32_s4_s4(%a0 : i32, %a1 : i32, %b0 : i32, %c0 : i32, %
      intOverflowBehavior=#nvvm.mma_int_overflow<satfinite>,
      shape = #nvvm.shape<m = 16, n = 8, k = 32>} : (i32, i32, i32) -> !llvm.struct<(i32,i32,i32,i32)>
   llvm.return %0 : !llvm.struct<(i32,i32,i32,i32)>
-}
+}