elf_loader refactored and added more symbols (#347)

Libraries/elf_loader/src/esp_all_symbol.c

@@ -0,0 +1,21 @@
+/*
+ * SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <stddef.h>
+
+#include "private/elf_symbol.h"
+
+/* Extern declarations from ELF symbol table */
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wbuiltin-declaration-mismatch"
+#pragma GCC diagnostic pop
+
+/* Available ELF symbols table: g_customer_elfsyms */
+
+const struct esp_elfsym g_customer_elfsyms[] = {
+    ESP_ELFSYM_END
+};