add progress bar to lightmap rendering

android/src/main/cpp/main.cpp

@@ -390,6 +390,7 @@ static int engine_init_display(struct engine* engine) {
             EGL_BLUE_SIZE, 8,
             EGL_GREEN_SIZE, 8,
             EGL_RED_SIZE, 8,
+            EGL_DEPTH_SIZE, 24,
             EGL_NONE
     };
     EGLint w, h, dummy, format;