Disable Pow test failing with recent coreclr change

Commit migrated from https://github.com/dotnet/corefx/commit/f4b4055e317e72e285ab6273b92c1b91c0ae7bd4

src/libraries/System.Runtime.Extensions/tests/System/Math.cs

@@ -251,6 +251,7 @@ public static void Log10()
             Assert.Equal(double.NaN, Math.Log10(double.NegativeInfinity));
         }
 
+        [ActiveIssue(9053)]
         [Fact]
         public static void Pow()
         {