certs: Convert spaces in certs/Makefile to a tab

There's a rule in certs/Makefile for which the command begins with eight
spaces.  This results in:

        ../certs/Makefile:21: FORCE prerequisite is missing
        ../certs/Makefile:21: *** missing separator.  Stop.

Fix this by turning the spaces into a tab.

Fixes: addf466 ("certs: Check that builtin blacklist hashes are valid")
Signed-off-by: David Howells <[email protected]>
Reviewed-by: Jarkko Sakkinen <[email protected]>
Reviewed-by: Mickaël Salaün <[email protected]>
cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]/ # v1
Signed-off-by: Linus Torvalds <[email protected]>

certs/Makefile

@@ -18,7 +18,7 @@ CFLAGS_blacklist_hashes.o += -I$(srctree)
 
 targets += blacklist_hashes_checked
 $(obj)/blacklist_hashes_checked: $(SYSTEM_BLACKLIST_HASH_LIST_SRCPREFIX)$(SYSTEM_BLACKLIST_HASH_LIST_FILENAME) scripts/check-blacklist-hashes.awk FORCE
-       $(call if_changed,check_blacklist_hashes,$(SYSTEM_BLACKLIST_HASH_LIST_SRCPREFIX)$(CONFIG_SYSTEM_BLACKLIST_HASH_LIST))
+	$(call if_changed,check_blacklist_hashes,$(SYSTEM_BLACKLIST_HASH_LIST_SRCPREFIX)$(CONFIG_SYSTEM_BLACKLIST_HASH_LIST))
 obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist_hashes.o
 else
 obj-$(CONFIG_SYSTEM_BLACKLIST_KEYRING) += blacklist_nohashes.o