fix: ld_script.txt, tabs vs spaces & add: asmdiff.sh

ld_script.txt

@@ -215,7 +215,6 @@ SECTIONS {
         asm/hall_of_fame.o(.text);
         asm/credits.o(.text);
         src/diploma.o(.text);
-        asm/diploma.o(.text);
         asm/save_failed_screen.o(.text);
         asm/clear_save_data_screen.o(.text);
         asm/evolution_graphics.o(.text);

tools/asmdiff.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+OBJDUMP="./tools/binutils/bin/arm-none-eabi-objdump -D -bbinary -marmv4t -Mforce-thumb"
+OPTIONS="--start-address=$1 --stop-address=$2"
+$OBJDUMP $OPTIONS baserom.gba > baserom.dump
+$OBJDUMP $OPTIONS pokefirered.gba > pokefirered.dump
+diff -u baserom.dump pokefirered.dump