Compress base.img using FastLZ library

Makefile

@@ -29,6 +29,11 @@ prepare:
 		$(PWD)/scripts/build-gcc.sh; \
 		cd ..; \
 	fi
+	if [ ! -e FastLZ/examples/6pack ] || [ ! -e FastLZ/examples/6unpack ]; then \
+		cd FastLZ/examples; \
+		make; \
+		cd ..; \
+	fi
 
 cleanall:
 	make clean
@@ -38,7 +43,7 @@ clean:
 	make -C kernel ARCH=$(ARCH) ROOT=$(PWD) clean
 	make -C user ARCH=$(ARCH) ROOT=$(PWD) clean
 	make -C ulib ARCH=$(ARCH) ROOT=$(PWD) clean
-	rm -f mop2.iso base.img disk.hdd
+	rm -f mop2.iso base.img disk.hdd base.img.lz77
 
 base:
 	./scripts/mkbaseimg.sh