ThunksDB: Adds X11 dependency to XCB

I was hitting an issue where thunking in Wine+Vulkan applications was breaking
unless both OpenGL and Vulkan was enabled.

Turns out this was because Vulkan enabled only XCB, which didn't enable
X11. So when XCB is thunked but X11 isn't, this causes weird issues
where X11 calls in to XCB functions and gets in desync'ed state. Causing
hangs to appear in xcb_take_socket.

Now we can enabled just `Vulkan` as a thunk and it'll work fine.

```
(gdb) bt
   from target:/usr/lib/fex-emu/HostThunks//libvulkan-host.so
```

Data/ThunksDB.json

@@ -46,6 +46,9 @@
       ]
     },
     "xcb": {
+      "Depends": [
+        "X11"
+      ],
       "Library": "libxcb-guest.so",
       "Overlay": [
         "@PREFIX_LIB@/libxcb.so",