message: Fix Incomplete framebuffer assert thrown for iOS
diff: @@ -111,6 +111,8 @@ void PlatformCocoaTouchGL::makeCurrent(SwapChain* drawSwapChain, SwapChain* read
  if (pImpl->mCurrentGlLayer != glLayer) {
  pImpl->mCurrentGlLayer = glLayer;
  + glBindFramebuffer(GL_FRAMEBUFFER, pImpl->mDefaultFramebuffer);
  +
  glBindRenderbuffer(GL_RENDERBUFFER, pImpl->mDefaultColorbuffer);
  [pImpl->mGLContext renderbufferStorage:GL_RENDERBUFFER fromDrawable:glLayer];
  @@ -122,12 +124,12 @@ void PlatformCocoaTouchGL::makeCurrent(SwapChain* drawSwapChain, SwapChain* read
  glBindRenderbuffer(GL_RENDERBUFFER, pImpl->mDefaultDepthbuffer);
  glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, width, height);
  - }
  // Test the framebuffer for completeness.
  GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
  ASSERT_POSTCONDITION(status == GL_FRAMEBUFFER_COMPLETE, "Incomplete framebuffer.");
  }
  +}
  void PlatformCocoaTouchGL::commit(Platform::SwapChain* swapChain) noexcept {
  glBindRenderbuffer(GL_RENDERBUFFER, pImpl->mDefaultColorbuffer);
  