Add MSFT_OPENXR_0_9_4_OR_NEWER and Gltf dependency

Author: keveleigh

Assets/MRTK/Providers/OpenXR/MRTK.OpenXR.asmdef

@@ -4,6 +4,7 @@
     "references": [
         "Microsoft.MixedReality.OpenXR",
         "Microsoft.MixedReality.Toolkit",
+        "Microsoft.MixedReality.Toolkit.Gltf",
         "Microsoft.MixedReality.Toolkit.Providers.XRSDK",
         "Unity.XR.Management",
         "Unity.XR.OpenXR"
@@ -28,6 +29,11 @@
             "expression": "",
             "define": "MSFT_OPENXR"
         },
+        {
+            "name": "com.microsoft.mixedreality.openxr",
+            "expression": "0.9.4",
+            "define": "MSFT_OPENXR_0_9_4_OR_NEWER"
+        },
         {
             "name": "com.microsoft.mixedreality.openxr",
             "expression": "0.2.0",