Fix socket closing on shutdown

Previously, sockets were only ever closed when the game specifically requested it.

Thanks @comex on GitHub for the patch submitted via the [Ryubing] issues page.

Co-Authored-By: comex <47517+comex@users.noreply.github.com>

src/Ryujinx.HLE/HOS/Services/Sockets/Bsd/IClient.cs

@@ -1165,5 +1165,13 @@ namespace Ryujinx.HLE.HOS.Services.Sockets.Bsd
 
             return WriteBsdResult(context, newSockFd, errno);
         }
+
+
+        public override void DestroyAtExit()
+        {
+            if (_context != null) {
+                _context.Dispose();
+            }
+        }
     }
 }