Lwjgl backend doesn't support OpenGL ES 3.2+
Creating a LwjglApplication with useGL30 set to true still doesn't create an OpenGL ES 3 context. Additionally, Gdx.gl30 is null.

The issue seems to be [here](https://github.com/libgdx/libgdx/blob/master/backends/gdx-backend-lwjgl/src/com/badlogic/gdx/backends/lwjgl/LwjglGraphics.java#L166). context should be passed in to Display.create along with the PixelFormat.

[This line](https://github.com/libgdx/libgdx/blob/master/backends/gdx-backend-lwjgl/src/com/badlogic/gdx/backends/lwjgl/LwjglGraphics.java#L241) should also check whether the major version is 3 and set gl30 accordingly.

diff --git a/backends/gdx-backend-lwjgl/src/com/badlogic/gdx/backends/lwjgl/LwjglGL20.java b/backends/gdx-backend-lwjgl/src/com/badlogic/gdx/backends/lwjgl/LwjglGL20.java
index 290afba2e..57cecebb6 100644
--- a/backends/gdx-backend-lwjgl/src/com/badlogic/gdx/backends/lwjgl/LwjglGL20.java
+++ b/backends/gdx-backend-lwjgl/src/com/badlogic/gdx/backends/lwjgl/LwjglGL20.java
@@ -89,7 +89,7 @@ class LwjglGL20 implements com.badlogic.gdx.graphics.GL20 {
 
 	public void glBufferData (int target, int size, Buffer data, int usage) {
 		if(data == null)
-			throw new GdxRuntimeException("Using null for the data not possible, blame LWJGL");
+			GL15.glBufferData(target, size, usage);
 		else if (data instanceof ByteBuffer)
 			GL15.glBufferData(target, (ByteBuffer)data, usage);
 		else if (data instanceof IntBuffer)
diff --git a/backends/gdx-backend-lwjgl/src/com/badlogic/gdx/backends/lwjgl/LwjglGraphics.java b/backends/gdx-backend-lwjgl/src/com/badlogic/gdx/backends/lwjgl/LwjglGraphics.java
index c193b5f17..985bc76f3 100644
--- a/backends/gdx-backend-lwjgl/src/com/badlogic/gdx/backends/lwjgl/LwjglGraphics.java
+++ b/backends/gdx-backend-lwjgl/src/com/badlogic/gdx/backends/lwjgl/LwjglGraphics.java
@@ -263,6 +263,7 @@ public class LwjglGraphics implements Graphics {
 
 		Gdx.gl = gl20;
 		Gdx.gl20 = gl20;
+		Gdx.gl30 = gl30;
 	}
 
 	private String glInfo () {
['backends/gdx-backend-lwjgl/src/com/badlogic/gdx/backends/lwjgl/LwjglGL20.java', 'backends/gdx-backend-lwjgl/src/com/badlogic/gdx/backends/lwjgl/LwjglGraphics.java']