python-pyasn1: use setuptools

Signed-off-by: Jeffery To <jeffery.to@gmail.com>

lang/python-pyasn1/Makefile

@@ -15,6 +15,8 @@ PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://pypi.python.org/packages/source/p/pyasn1
 PKG_MD5SUM:=f00a02a631d4016818659d1cc38d229a
 
+PKG_BUILD_DEPENDS:=python python-setuptools
+
 PKG_LICENSE:=BSD-2-Clause
 PKG_LICENSE_FILES:=LICENSE.txt
 PKG_MAINTAINER:=Jeffery To <jeffery.to@gmail.com>