textproc/py-chevron: Use PY_SETUPTOOLS

Approved by:	hrs (mentor, blanket)

textproc/py-chevron/Makefile

@@ -11,7 +11,7 @@ WWW=		https://pypi.org/project/chevron/
 
 LICENSE=	MIT
 
-BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}setuptools>0:devel/py-setuptools@${PY_FLAVOR} \
+BUILD_DEPENDS=	${PY_SETUPTOOLS} \
 		${PYTHON_PKGNAMEPREFIX}wheel>0:devel/py-wheel@${PY_FLAVOR}
 
 USES=		python