python-cffi: install host-side via pip + add myself 2nd maintainer

python-cryptography needs this dep to build
the sources.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

lang/python/python-cffi/Makefile

@@ -19,7 +19,10 @@ PKG_BUILD_DIR:=$(BUILD_DIR)/$(BUILD_VARIANT)-cffi-$(PKG_VERSION)
 
 PKG_LICENSE:=MIT
 PKG_LICENSE_FILES:=LICENSE
-PKG_MAINTAINER:=Jeffery To <jeffery.to@gmail.com>
+PKG_MAINTAINER:=Jeffery To <jeffery.to@gmail.com>, Alexandru Ardelean <ardeleanalex@gmail.com>
+
+HOST_PYTHON_PACKAGE_BUILD_DEPENDS:="cffi==$(PKG_VERSION)"
+HOST_PYTHON3_PACKAGE_BUILD_DEPENDS:="cffi==$(PKG_VERSION)"
 
 include $(INCLUDE_DIR)/package.mk
 $(call include_mk, python-package.mk)