dev-python/grpcio: readd py2

dev-python/grpcio/Manifest

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+DIST grpcio-1.28.1.tar.gz 19511346 BLAKE2B 01ebdeddcba5efbb67880693ede04ccd828771fe73def24a91d882c28f5cf6f14215daca212df1d8bb9372f385aff1e31418870437c87343f218e7b78a06b04c SHA512 12feaee3816a5e7b20b648a144d37f7e550a057112f5460bc4ec016885461951148cd4d2900fbfc905f76059ef29ae4c4d1d5a3216e5e3a2d17048c8b45f394f
+EBUILD grpcio-1.28.1.ebuild 982 BLAKE2B f950926f6931bd43d968f0d51be8d4d8fad6e2cf39e9983e0475afa740e0f560f8ea7a873f2c044dd993addcf42a45af53618547fd4e04c0a43ea5193549d7ff SHA512 2f70766fd32f8696353450ab7beeef34cc62b4725111960a33beddced3fa82f8c7415d6da4707b75e3f2fcb59c4be69970f50556851b3addf4620bbc2f694bea

dev-python/grpcio/grpcio-1.28.1.ebuild

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+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python2_7 python3_{6,7,8} )
+inherit distutils-r1 multiprocessing
+
+DESCRIPTION="High-performance RPC framework (python libraries)"
+HOMEPAGE="https://grpc.io"
+SRC_URI="mirror://pypi/${PN::1}/${PN}/${P}.tar.gz"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="~amd64 ~arm64 ~ppc64 ~x86"
+
+RDEPEND=">=dev-libs/openssl-1.0.2:0=[-bindist]
+	>=dev-python/cython-0.28.3[${PYTHON_USEDEP}]
+	dev-python/protobuf-python[${PYTHON_USEDEP}]
+	dev-python/six[${PYTHON_USEDEP}]
+	net-dns/c-ares:=
+	sys-libs/zlib:=
+"
+DEPEND="${RDEPEND}
+	dev-python/setuptools[${PYTHON_USEDEP}]
+"
+
+python_configure_all() {
+	export GRPC_PYTHON_DISABLE_LIBC_COMPATIBILITY=1
+	export GRPC_PYTHON_BUILD_SYSTEM_CARES=1
+	export GRPC_PYTHON_BUILD_SYSTEM_OPENSSL=1
+	export GRPC_PYTHON_BUILD_SYSTEM_ZLIB=1
+	export GRPC_PYTHON_BUILD_WITH_CYTHON=1
+	export GRPC_PYTHON_BUILD_EXT_COMPILER_JOBS="$(makeopts_jobs)"
+}