Add instructions on how to support GPU with TFJava 1.0.0

MIGRATING.md

@@ -49,6 +49,24 @@ The Java Module (jigsaw) names has been updated to drop the leading `org.`, as f
 - `tensorflow-core-native` : `tensorflow.nativelib`
 - `tensorflow-framework` :  `tensorflow.framework` (was `org.tensorflow.framework` before)
 
+### GPU Support
+
+Previous versions of TF Java were building a `tensorflow-core-platform-gpu` artifact upon which application could depend
+on to include any TensorFlow native library that GPU support enabled. Since TensorFlow has removed its support of GPU
+on all platforms other that Linux, we removed our platform JAR in favour of simply adding a dependency on the
+`linux-x86_64-gpu` native artifact. 
+```xml
+<dependency>
+    <group>org.tensorflow</group>
+    <artifact>tensorflow-core-native</artifact>
+    <version>1.0.0</version>
+    <classifier>linux-x86_64-gpu</classifier>
+</dependency>
+```
+Please note that including this dependency won't work if your application also depends on `tensorflow-core-platform`. If
+you need to support more platforms that Linux, you should include the other `tensorflow-core-native` dependencies 
+separately (see the [README](README.md) file).
+
 ### Session Run Result
 
 In versions before 0.4.0 `Session.Runner.run` and `TensorFunction.call` returned a `List<Tensor>`. In newer versions