[build.zig] Make X11 the default display backend instead of choosing at runtime (#5168)

build.zig

@@ -425,7 +425,7 @@ pub const Options = struct {
     rtextures: bool = true,
     platform: PlatformBackend = .glfw,
     linkage: std.builtin.LinkMode = .static,
-    linux_display_backend: LinuxDisplayBackend = .Both,
+    linux_display_backend: LinuxDisplayBackend = .X11,
     opengl_version: OpenglVersion = .auto,
     android_ndk: []const u8 = "",
     android_api_version: []const u8 = "35",