make help: add tools help target

	@echo  '  headers_install - Install sanitised kernel headers to INSTALL_HDR_PATH'; \

	 echo  '                    (default: $(INSTALL_HDR_PATH))'; \

	 echo  ''

	@echo  'Static analysers'

	@echo  'Static analysers:'

	@echo  '  checkstack      - Generate a list of stack hogs'

	@echo  '  namespacecheck  - Name space analysis on compiled kernel'

	@echo  '  versioncheck    - Sanity check on version.h usage'

	@echo  '  headerdep       - Detect inclusion cycles in headers'

	@$(MAKE) -f $(srctree)/scripts/Makefile.help checker-help

	@echo  ''

	@echo  'Kernel selftest'

	@echo  'Kernel selftest:'

	@echo  '  kselftest       - Build and run kernel selftest (run as root)'

	@echo  '                    Build, install, and boot kernel before'

	@echo  '                    running kselftest on it'

	@echo  '  kselftest-merge - Merge all the config dependencies of kselftest to existed'

	@echo  '                    .config.'

	@echo  ''

	@echo 'Userspace tools targets:'

	@echo '  use "make tools/help"'

	@echo '  or  "cd tools; make help"'

	@echo  ''

	@echo  'Kernel packaging:'

	@$(MAKE) $(build)=$(package-dir) help

	@echo  ''