Merge pull request #1164 from Unity-Technologies/hd-target-texture-flip

Fixed Y-flip in HD when a camera is rendering to a RT

ScriptableRenderPipeline/HDRenderPipeline/HDRP/HDRenderPipeline.cs

                 context.command = cmd;
                 context.camera = hdcamera.camera;
                 context.sourceFormat = RenderTextureFormat.ARGBHalf;
-                context.flip = true;
+                context.flip = hdcamera.camera.targetTexture == null;
 
                 layer.Render(context);
             }