[build]: Fixes: fatal: not a git repository error during build (sonic…

…-net#6090)

It fixes the following error during build.

>>> fatal: not a git repository (or any of the parent directories): .git
        "SONIC_DPKG_CACHE_METHOD"         : "cache"
        "DPKG_CACHE_PATH"                 : "/var/cache/sonic/artifacts"

rules/sonic-host-service.dep

@@ -1,4 +1,5 @@
 
+ifeq ($(INCLUDE_HOST_SERVICE), y)
 SPATH       := $($(SONIC_HOST_SERVICE)_SRC_PATH)
 DEP_FILES   := $(SONIC_COMMON_FILES_LIST) rules/sonic-host-service.mk rules/sonic-host-service.dep
 SMDEP_FILES := $(addprefix $(SPATH)/,$(shell cd $(SPATH) && git ls-files))
@@ -8,4 +9,4 @@ $(SONIC_HOST_SERVICE)_DEP_FLAGS   := $(SONIC_COMMON_FLAGS_LIST)
 $(SONIC_HOST_SERVICE)_DEP_FILES   := $(DEP_FILES)
 $(SONIC_HOST_SERVICE)_SMDEP_FILES := $(SMDEP_FILES)
 $(SONIC_HOST_SERVICE)_SMDEP_PATHS := $(SPATH)
-
+endif