Update rtthread-lpc17xx.ld

bsp/lpc176x/rtthread-lpc17xx.ld

@@ -37,6 +37,10 @@ SECTIONS
         KEEP(*(VSymTab))
         __vsymtab_end = .;
         . = ALIGN(4);
+        __rt_init_start = .;
+        KEEP(*(.rti_fn*))
+        __rt_init_end = .;
+        . = ALIGN(4);
 
         . = ALIGN(4);
         _etext = .;