FBX-100: stop testing on linux for the 4.0.1 release

The CI machines don't have the required libstdc++; turn off testing and
re-enable it after release.

Author: benoithudson

com.unity.formats.fbx/Tests/LinuxTests.meta

@@ -0,0 +1,25 @@
+{
+    "name": "FbxExporterLinuxTest",
+    "rootNamespace": "",
+    "references": [
+        "Autodesk.Fbx",
+        "UnityEngine.TestRunner",
+        "UnityEditor.TestRunner"
+    ],
+    "includePlatforms": [
+        "Editor"
+    ],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": true,
+    "precompiledReferences": [
+        "nunit.framework.dll"
+    ],
+    "autoReferenced": false,
+    "defineConstraints": [
+        "UNITY_EDITOR_LINUX",
+        "UNITY_INCLUDE_TESTS"
+    ],
+    "versionDefines": [],
+    "noEngineReferences": false
+}

com.unity.formats.fbx/Tests/LinuxTests/LinuxTest.asmdef

@@ -0,0 +1,28 @@
+// ***********************************************************************
+// Copyright (c) 2021 Unity Technologies. All rights reserved.
+//
+// Licensed under the ##LICENSENAME##.
+// See LICENSE.md file in the project root for full license information.
+// ***********************************************************************
+
+using NUnit.Framework;
+using Autodesk.Fbx;
+using System.IO;
+using System.Collections.Generic;
+
+namespace Autodesk.Fbx.LinuxTest
+{
+    /// <summary>
+    /// On linux, in v4.0.1, we temporarily have no tests because of an issue
+    /// with the CI machines not having libstdc++ required for FBX SDK.
+    ///
+    /// But we need at least one test. So here goes.
+    /// </summary>
+    internal class EmptyTest
+    {
+        [Test]
+        public static void Pass()
+        {
+        }
+    }
+}

com.unity.formats.fbx/Tests/LinuxTests/LinuxTest.asmdef.meta

@@ -8,6 +8,8 @@
     "overrideReferences": false,
     "precompiledReferences": [],
     "autoReferenced": true,
-    "defineConstraints": [],
+    "defineConstraints": [
+        "!UNITY_EDITOR_LINUX"
+    ],
     "versionDefines": []
 }

com.unity.formats.fbx/Tests/LinuxTests/LinuxTest.cs

@@ -18,5 +18,7 @@
     "overrideReferences": false,
     "precompiledReferences": [],
     "autoReferenced": true,
-    "defineConstraints": []
+    "defineConstraints": [
+        "!UNITY_EDITOR_LINUX"
+    ]
 }