core/sub.mk: add missing dependency on the TA key processing script

Signed-off-by: Jerome Forissier <[email protected]>
Reviewed-by: Jens Wiklander <[email protected]>

core/sub.mk

@@ -5,7 +5,7 @@ subdirs-y += drivers
 ifeq ($(CFG_WITH_USER_TA)-$(CFG_REE_FS_TA),y-y)
 gensrcs-y += ta_pub_key
 produce-ta_pub_key = ta_pub_key.c
-depends-ta_pub_key = $(TA_SIGN_KEY)
+depends-ta_pub_key = $(TA_SIGN_KEY) scripts/pem_to_pub_c.py
 recipe-ta_pub_key = scripts/pem_to_pub_c.py --prefix ta_pub_key \
 		--key $(TA_SIGN_KEY) --out $(sub-dir-out)/ta_pub_key.c
 cleanfiles += $(sub-dir-out)/ta_pub_key.c