build: get rid of host.mk

Defined required host related variables in toplevel.mk instead

Signed-off-by: Felix Fietkau <nbd@nbd.name>

target/imagebuilder/Makefile

@@ -7,7 +7,6 @@
 
 include $(TOPDIR)/rules.mk
 include $(INCLUDE_DIR)/kernel.mk
-include $(INCLUDE_DIR)/host.mk
 include $(INCLUDE_DIR)/version.mk
 include $(INCLUDE_DIR)/feeds.mk
 

target/imagebuilder/files/Makefile

@@ -13,7 +13,7 @@ export TOPDIR LC_ALL LANG
 export OPENWRT_VERBOSE=s
 all: help
 
-include $(TOPDIR)/include/host.mk
+export PATH:=$(TOPDIR)/staging_dir/host/bin:$(PATH)
 
 ifneq ($(OPENWRT_BUILD),1)
   override OPENWRT_BUILD=1
@@ -82,7 +82,6 @@ PROFILE_LIST = $(foreach p,$(PROFILE_NAMES), \
 
 staging_dir/host/.prereq-build: include/prereq-build.mk
 	mkdir -p tmp
-	rm -f tmp/.host.mk
 	@$(_SINGLE)$(NO_TRACE_MAKE) -j1 -r -s -f $(TOPDIR)/include/prereq-build.mk prereq 2>/dev/null || { \
 		echo "Prerequisite check failed. Use FORCE=1 to override."; \
 		false; \