Export LVGL canvas symbols for side-loaded GameBoy app

TactilityC/Source/tt_init.cpp

@@ -43,6 +43,7 @@
 #include <esp_netif.h>
 #include <esp_heap_caps.h>
 #include <esp_timer.h>
+#include <lvgl.h>
 #include <fcntl.h>
 #include <lwip/sockets.h>
 #include <lwip/netdb.h>
@@ -376,6 +377,13 @@ const esp_elfsym main_symbols[] {
     // tt::lvgl
     ESP_ELFSYM_EXPORT(tt_lvgl_spinner_create),
 
+    // LVGL APIs needed by side-loaded apps that render into canvases.
+    ESP_ELFSYM_EXPORT(lv_canvas_create),
+    ESP_ELFSYM_EXPORT(lv_canvas_set_buffer),
+    ESP_ELFSYM_EXPORT(lv_obj_invalidate),
+    ESP_ELFSYM_EXPORT(lv_display_get_horizontal_resolution),
+    ESP_ELFSYM_EXPORT(lv_display_get_vertical_resolution),
+
     // stdio.h
     ESP_ELFSYM_EXPORT(rename),
     ESP_ELFSYM_EXPORT(rewind),