ports: nxp/mcx/mcxa/frdm-mcxa156: Fix GNU toolchain builds.

This patch modifies the original linker script provided by NXP by
adding RT-Thread related constant tables to flash.

Signed-off-by: Yilin Sun <imi415@imi.moe>

bsp/nxp/mcx/mcxa/frdm-mcxa156/board/linker_scripts/MCXA156_flash.ld

@@ -66,6 +66,26 @@ SECTIONS
     . = ALIGN(4);
   } > m_text
 
+  .rtt_const_tables :
+  {
+    /* section information for finsh shell */
+    . = ALIGN(4);
+    __fsymtab_start = .;
+    KEEP(*(FSymTab))
+    __fsymtab_end = .;
+
+    . = ALIGN(4);
+    __vsymtab_start = .;
+    KEEP(*(VSymTab))
+    __vsymtab_end = .;
+
+    /* section information for initial. */
+    . = ALIGN(4);
+    __rt_init_start = .;
+    KEEP(*(SORT(.rti_fn*)))
+    __rt_init_end = .;
+  } > m_text
+
   .ARM.extab :
   {
     *(.ARM.extab* .gnu.linkonce.armextab.*)