[tests] Give the CGImagePropertiesGPSTest some latitude with the coor…

…dinates. (#18375)

Seems like the actual values on device might be ever so slightly off.

tests/monotouch-test/CoreGraphics/CGImagePropertiesGPSTest.cs

@@ -28,8 +28,8 @@ public void LongitudeRefAndLatitudeRefTest ()
 			using (var url = NSUrl.FromFilename (file))
 			using (var ci = CIImage.FromUrl (url)) {
 				var gps = ci.Properties.Gps;
-				Assert.AreEqual (expectedLatitude, gps.Latitude, "Invalid or no Latitude value found.");
-				Assert.AreEqual (expectedLongitude, gps.Longitude, "Invalid or no Longitude value found.");
+				Assert.AreEqual (expectedLatitude, gps.Latitude, 0.0001f, "Invalid or no Latitude value found.");
+				Assert.AreEqual (expectedLongitude, gps.Longitude, 0.0001f, "Invalid or no Longitude value found.");
 				Assert.AreEqual (expectedLatitudeRef, gps.LatitudeRef, "Invalid or no LatitudeRef value found.");
 				Assert.AreEqual (expectedLongitudeRef, gps.LongitudeRef, "Invalid or no LongitudeRef value found.");
 			}