[bsp][utest] 添加 rt-spark 在 gcc 下运行 utest 链接代码段

bsp/stm32/stm32f407-rt-spark/board/linker_scripts/link.lds

@@ -43,6 +43,12 @@ SECTIONS
         KEEP(*(VSymTab))
         __vsymtab_end = .;
 
+        /* section information for utest */
+        . = ALIGN(4);
+        __rt_utest_tc_tab_start = .;
+        KEEP(*(UtestTcTab))
+        __rt_utest_tc_tab_end = .;
+
         /* section information for initial. */
         . = ALIGN(4);
         __rt_init_start = .;