build: add the SIBO SDK

code/SIBOSDK/demo/w_hello.c

@@ -0,0 +1,16 @@
+#include <p_std.h>
+#include <wlib.h>
+
+GLDEF_C INT main(VOID)
+    {
+    WS_EV event;
+
+    wStartup();
+    gBorder(W_BORD_CORNER_4);
+    wSetBusyMsg("Hello world",W_CORNER_BOTTOM_LEFT);
+    do
+        {
+        wGetEventWait(&event);
+        } while (event.type!=WM_KEY || event.p.key.keycode!=W_KEY_ESCAPE);
+    return(0);
+    }