layer: Fix 32-bit layer crash

Some fprintf pointers added in "layer: Fix oldSwapchain when going in/out
of XWayland bypassing" will crash when executed in the 32-bit WSI layer.

GCC also warns about the pointer usage with:

```
 1085 |       fprintf(stderr, "[Gamescope WSI] Destroying swapchain: %p\n", swapchain);
      |                                                              ~^     ~~~~~~~~~
      |                                                               |     |
      |                                                               void* VkSwapchainKHR {aka long long unsigned int}
      |                                                              %lld

 1087 |       fprintf(stderr, "[Gamescope WSI] Destroyed swapchain: %p\n", swapchain);
      |                                                             ~^     ~~~~~~~~~
      |                                                              |     |
      |                                                              void* VkSwapchainKHR {aka long long unsigned int}
      |                                                             %lld

 1167 |       fprintf(stderr, "[Gamescope WSI] Creating swapchain for xid: 0x%0x - oldSwapchain: %p - provided minImageCount: %u - minImageCount: %u - format: %s - colorspace: %s - flip: %s\n",
      |                                                                                          ~^
      |                                                                                           |
      |                                                                                           void*
      |                                                                                          %lld
 1168 |         gamescopeSurface->window,
 1169 |         pCreateInfo->oldSwapchain,
      |         ~~~~~~~~~~~~~~~~~~~~~~~~~
      |                      |
      |                      long long unsigned int

 1248 |       fprintf(stderr, "[Gamescope WSI] Created swapchain for xid: 0x%0x swapchain: %p - imageCount: %u\n",
      |                                                                                    ~^
      |                                                                                     |
      |                                                                                     void*
      |                                                                                    %lld
 1249 |         gamescopeSurface->window,
 1250 |         *pSwapchain,
      |         ~~~~~~~~~~~
      |         |
      |         VkSwapchainKHR {aka long long unsigned int}
```

To keep it simple, let's just cast the problematic pointers to void*.

Closes:  ValveSoftware#1718
Closes:  ValveSoftware#1736

layer/VkLayer_FROG_gamescope_wsi.cpp

@@ -1082,9 +1082,9 @@ namespace GamescopeWSILayer {
         gamescope_swapchain_destroy(state->object);
       }
       GamescopeSwapchain::remove(swapchain);
-      fprintf(stderr, "[Gamescope WSI] Destroying swapchain: %p\n", swapchain);
+      fprintf(stderr, "[Gamescope WSI] Destroying swapchain: %p\n", (void*)swapchain);
       pDispatch->DestroySwapchainKHR(device, swapchain, pAllocator);
-      fprintf(stderr, "[Gamescope WSI] Destroyed swapchain: %p\n", swapchain);
+      fprintf(stderr, "[Gamescope WSI] Destroyed swapchain: %p\n", (void*)swapchain);
     }
 
     static VkResult CreateSwapchainKHR(
@@ -1166,7 +1166,7 @@ namespace GamescopeWSILayer {
 
       fprintf(stderr, "[Gamescope WSI] Creating swapchain for xid: 0x%0x - oldSwapchain: %p - provided minImageCount: %u - minImageCount: %u - format: %s - colorspace: %s - flip: %s\n",
         gamescopeSurface->window,
-        pCreateInfo->oldSwapchain,
+        (void*)pCreateInfo->oldSwapchain,
         pCreateInfo->minImageCount,
         minImageCount,
         vkroots::helpers::enumString(pCreateInfo->imageFormat),
@@ -1247,7 +1247,7 @@ namespace GamescopeWSILayer {
 
       fprintf(stderr, "[Gamescope WSI] Created swapchain for xid: 0x%0x swapchain: %p - imageCount: %u\n",
         gamescopeSurface->window,
-        *pSwapchain,
+        (void*)*pSwapchain,
         imageCount);
 
       gamescope_swapchain_swapchain_feedback(