Fix shasum format

Author: ChinYikMing

mk/external.mk

@@ -19,9 +19,9 @@ define download
 $($(T)_DATA):
 	$(VECHO) "  GET\t$$@\n"
 	$(Q)curl --progress-bar -O -L -C - "$(strip $($(T)_DATA_URL))"
-	$(Q)echo "$(strip $$($(T)_DATA_SHA1)) $$@.bz2" | $(SHA1SUM) -c
+	$(Q)echo "$(strip $$($(T)_DATA_SHA1))  $$@.bz2" | $(SHA1SUM) -c
 	$(Q)bunzip2 $$@.bz2
 endef
 
 EXTERNAL_DATA = KERNEL INITRD
-$(foreach T,$(EXTERNAL_DATA),$(eval $(download))) 
+$(foreach T,$(EXTERNAL_DATA),$(eval $(download)))