- Make the tools implicitly when making the ROM

- Add a clean target to the tools Makefile
- Run said clean target when cleaning the pokecrystal directory

tools/Makefile

@@ -1,13 +1,18 @@
-.PHONY: all
+.PHONY: all clean
 
-all: \
+tools := \
 	lzcomp \
 	png_dimensions \
 	scan_includes \
 	palette \
 	pokemon_animation \
 	pokemon_animation_graphics
+
+all: $(tools)
 	@:
 
+clean:
+	rm -f $(tools)
+
 %: %.c
 	$(CC) -o $@ $<