package/python-setuptools: migrate to pep517 build backend

Now that all dependencies of host-python-setuptools no longer
use setuptools as a build backend we can now migrate setuptools
itself to the pep517 build backend.

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>

package/pkg-python.mk

@@ -233,7 +233,7 @@ endif # ($(4),target)
 # interpreter (both host and target).
 #
 ifeq ($$($(2)_SETUP_TYPE),setuptools)
-$(2)_DEPENDENCIES += $$(if $$(filter host-python-setuptools,$(1)),,host-python-setuptools)
+$(2)_DEPENDENCIES += host-python-setuptools
 else ifneq ($$(filter flit pep517,$$($(2)_SETUP_TYPE)),)
 $(2)_DEPENDENCIES += host-python-pypa-build host-python-installer
 ifeq ($$($(2)_SETUP_TYPE),flit)

package/python-setuptools/python-setuptools.mk

@@ -11,7 +11,8 @@ PYTHON_SETUPTOOLS_LICENSE = MIT
 PYTHON_SETUPTOOLS_LICENSE_FILES = LICENSE
 PYTHON_SETUPTOOLS_CPE_ID_VENDOR = python
 PYTHON_SETUPTOOLS_CPE_ID_PRODUCT = setuptools
-PYTHON_SETUPTOOLS_SETUP_TYPE = setuptools
+PYTHON_SETUPTOOLS_SETUP_TYPE = pep517
+HOST_PYTHON_SETUPTOOLS_DEPENDENCIES = host-python-wheel
 
 $(eval $(python-package))
 $(eval $(host-python-package))