[#172] Makefile: Add filter to help target

Signed-off-by: Angira Kekteeva <[email protected]>

Author: masterSplinter01

help.mk

@@ -1,5 +1,7 @@
 .PHONY: help
 
+HELP_MAKEFILE_LIST=$(filter-out %/artifacts.mk, $(MAKEFILE_LIST))
+
 # Show this help prompt
 help:
 	@echo '  Usage:'
@@ -8,4 +10,4 @@ help:
 	@echo ''
 	@echo '  Targets:'
 	@echo ''
-	@awk '/^#/{ comment = substr($$0,3) } comment && /^[a-zA-Z][a-zA-Z0-9._/-]+ ?:/{ print "   ", $$1, comment }' $(MAKEFILE_LIST) | column -t -s ':' | grep -v 'IGNORE' | sort -u
+	@awk '/^#/{ comment = substr($$0,3) } comment && /^[a-zA-Z][a-zA-Z0-9._/-]+ ?:/{ print "   ", $$1, comment }' $(HELP_MAKEFILE_LIST) | column -t -s ':' | grep -v 'IGNORE' | sort -u