Re-add missing dependency for derived debs. (sonic-net#16896)

* Re-add missing dependency for derived debs.

My previous changed removed the whole dependency on the main deb
existing, not just the installation of the main deb. Fix this by
readding a dependency on the main deb being built/pulled from cache.

Signed-off-by: Saikrishna Arcot <sarcot@microsoft.com>

* Add the kernel and initramfs as dependencies for RFS build

Signed-off-by: Saikrishna Arcot <sarcot@microsoft.com>

---------

Signed-off-by: Saikrishna Arcot <sarcot@microsoft.com>

Author: saiarcot895

Makefile.cache

@@ -359,6 +359,7 @@ endef
 
 RFS_DEP_FILES := $(wildcard \
 	$(addprefix scripts/, build_debian_base_system.sh prepare_debian_image_buildinfo.sh build_mirror_config.sh) \
+	$(addprefix $(IMAGE_DISTRO_DEBS_PATH)/,$(INITRAMFS_TOOLS) $(LINUX_KERNEL)) \
 	$(shell git ls-files files/initramfs-tools) \
 	$(shell git ls-files files/image_config) \
 	$(shell git ls-files files/apparmor) \

slave.mk

@@ -793,7 +793,7 @@ SONIC_TARGET_LIST += $(addprefix $(DEBS_PATH)/, $(SONIC_DPKG_DEBS))
 # we depend on it and move our deb to other targets
 # Add new dev package:
 #     $(eval $(call add_derived_package,$(ORIGINAL_DEB),derived_deb_file.deb))
-$(addprefix $(DEBS_PATH)/, $(SONIC_DERIVED_DEBS)) : $(DEBS_PATH)/% : .platform
+$(addprefix $(DEBS_PATH)/, $(SONIC_DERIVED_DEBS)) : $(DEBS_PATH)/% : .platform $$(addprefix $(DEBS_PATH)/,$$($$*_DEPENDS))
 	$(HEADER)
 	# All noise takes place in main deb recipe, so we are just telling that
 	# we depend on it