Imported Upstream version 5.4.0.167

Former-commit-id: 5624ac747d633e885131e8349322922b6a59baaa

mcs/class/Mono.Posix/Test/Mono.Unix.Native/StdlibTest.cs

@@ -56,7 +56,7 @@ namespace MonoTests.Mono.Unix.Native {
 			Assert.IsFalse (NativeConvert.ToSignum (st.signalReceived) == Signum.SIGURG,
 					"#IH: Signal Handler invoked when it should have been removed!");
 		}
-
+#if !NETCOREAPP2_0
 		[Test]
 		// MSVCRT.DLL doesn't export snprintf(3).
 		[Category ("NotDotNet")]
@@ -92,6 +92,7 @@ namespace MonoTests.Mono.Unix.Native {
 			Assert.AreEqual (s.ToString(), expected,
 					"#SNPF: printf of many builtin types failed");
 		}
+#endif
 	}
 }