Samples: Fix Capture/Replay sample

New header required to compile. It mirrors one used by
our perf tests, but this one will remain basic.

Test: Replay a new trace
Bug: angleproject:4845
Change-Id: If42bba6a91bf37ed063b5828b4cbc80373108b2f
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2327292
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Cody Northrop <cnorthrop@google.com>

Author: cnorthrop

samples/capture_replay/angle_trace_gl.h

@@ -0,0 +1,13 @@
+//
+// Copyright 2020 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+// Sets up the GL bindings for capture_replay_sample
+
+#ifndef ANGLE_TRACE_GL_H_
+#define ANGLE_TRACE_GL_H_
+
+#include "util/util_gl.h"
+
+#endif  // ANGLE_TRACE_GL_H_