vulkan: Add function stub & plumbing for KHR_swapchain_front_buffered

Test: build
Change-Id: I6ea2e33e708067f11069bda19c4b5ea167158913
diff --git a/vulkan/libvulkan/swapchain.cpp b/vulkan/libvulkan/swapchain.cpp
index 296be2d..66e1b0f 100644
--- a/vulkan/libvulkan/swapchain.cpp
+++ b/vulkan/libvulkan/swapchain.cpp
@@ -1077,5 +1077,16 @@
     return result;
 }
 
+VKAPI_ATTR
+VkResult GetSwapchainStatusKHR(
+    VkDevice,
+    VkSwapchainKHR) {
+    VkResult result = VK_SUCCESS;
+
+    // TODO(chrisforbes): Implement this function properly
+
+    return result;
+}
+
 }  // namespace driver
 }  // namespace vulkan