add/update gui user apps/libs

user/src/bin/gui.rs

@@ -0,0 +1,19 @@
+#![no_std]
+#![no_main]
+
+use user_lib::create_desktop;
+
+#[macro_use]
+extern crate user_lib;
+
+
+
+#[no_mangle]
+pub fn main() -> i32 {
+    println!("gui");
+    create_desktop();
+    println!("exit pass.");
+    loop{}
+    0
+}
+