Copy NC operator

PiperOrigin-RevId: 314845678
diff --git a/src/operator-strings.c b/src/operator-strings.c
index 358af55..31300c6 100644
--- a/src/operator-strings.c
+++ b/src/operator-strings.c
@@ -48,6 +48,8 @@
       return "Convolution (NHWC, Q8)";
     case xnn_operator_type_convolution_nchw_f32:
       return "Convolution (NCHW, F32)";
+    case xnn_operator_type_copy_nc_x32:
+      return "Copy (NC, X32)";
     case xnn_operator_type_deconvolution_nhwc_f32:
       return "Deconvolution (NHWC, F32)";
     case xnn_operator_type_deconvolution_nhwc_q8: