Split off renewable_hidden_items.c

ld_script.txt

@@ -283,6 +283,7 @@ SECTIONS {
         src/unk_815C980.o(.text);
         src/ss_anne.o(.text);
         src/cereader_tool.o(.text);
+        src/renewable_hidden_items.o(.text);
         src/trainer_tower.o(.text);
         src/berry_powder.o(.text);
         src/unk_815F138.o(.text);
@@ -516,6 +517,7 @@ SECTIONS {
         data/data_8471F00.o(.rodata.8479668);
         src/ss_anne.o(.rodata);
         src/cereader_tool.o(.rodata);
+        src/renewable_hidden_items.o(.rodata);
         src/trainer_tower.o(.rodata);
         src/unk_815F138.o(.rodata);
         src/berry_fix_program.o(.rodata);