net-libs/libnsl: Add from Gentoo

It's from Gentoo commit 912b3be04d9e5ee047d2d5c2006534a87bb03c36.

It's a dependency of the updated sys-devel/gdb package.

sdk_container/src/third_party/portage-stable/net-libs/libnsl/Manifest

@@ -0,0 +1,2 @@
+DIST libnsl-1.3.0.tar.xz 321488 BLAKE2B 25cb4fa2b3f161ce4cd06ca5cc0a716bf981620de4eb102f464bc1919b8f6d82f7b02a6108260122000bbac0307d9db05d406183dc533dd1b97683d08a7fc5f5 SHA512 a5a6c3ccb2d1e724c8c1f65e55dcd09383eb1ae019c55f4c09441eadf23ffbc2196cfad259805b0ac40ddf3a10af0da453e4d739d67d46829c64d0995dab4e55
+DIST libnsl-2.0.0.tar.xz 284408 BLAKE2B 843cd0346b45a688c59b88caebd9c5c938b0ef4b5e751b27599ae725a19f0ba2b88bc23b861edc75d79ae6c6bb829e4f82e9e3cd994d25d3385b1a75b9b58b8e SHA512 02ff41d335b7e965182c1f47a6448c1a71ae991a4d5a86ae5472cea7b38633a36b736469cc0d9fc407c706f3f144f90e4b7c9653643976805aa96fc319a69784

sdk_container/src/third_party/portage-stable/net-libs/libnsl/files/libnsl-1.3.0-rpath.patch

@@ -0,0 +1,16 @@
+https://bugs.gentoo.org/732100
+
+Remove invalid shell from config.rpath.
+--- a/config.rpath
++++ b/config.rpath
+@@ -216,9 +216,7 @@ if test "$with_gnu_ld" = yes; then
+       ;;
+     gnu* | linux* | tpf* | k*bsd*-gnu | kopensolaris*-gnu)
+       if $LD --help 2>&1 | grep ': supported targets:.* elf' > /dev/null; then
+-        if $libdir == /usr/lib | $libdir == /usr/lib64; then
+-		     hardcode_libdir_flag_spec=""
+-	     fi
++        :
+       else
+         ld_shlibs=no
+       fi

sdk_container/src/third_party/portage-stable/net-libs/libnsl/libnsl-0-r2.ebuild

@@ -0,0 +1,19 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+# Used only to populate IUSE, bug 643058
+inherit multilib-build
+
+DESCRIPTION="Public client interface for NIS(YP) and NIS+ in a IPv6 ready version"
+HOMEPAGE="https://github.com/thkukuk/libnsl"
+
+# Fake version to help portage upgrading.
+
+LICENSE="LGPL-2.1+"
+SLOT="0/1"
+KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 ~m68k ~mips ppc ppc64 ~s390 sparc x86 ~amd64-linux ~x86-linux"
+
+DEPEND="elibc_glibc? ( <sys-libs/glibc-2.26 )"
+RDEPEND="${DEPEND}"

sdk_container/src/third_party/portage-stable/net-libs/libnsl/libnsl-1.3.0-r2.ebuild

@@ -0,0 +1,42 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit multilib-minimal
+
+DESCRIPTION="Public client interface for NIS(YP) and NIS+ in a IPv6 ready version"
+HOMEPAGE="https://github.com/thkukuk/libnsl"
+SRC_URI="https://github.com/thkukuk/${PN}/releases/download/v${PV}/${P}.tar.xz"
+
+SLOT="0/2"
+LICENSE="LGPL-2.1+"
+
+# Stabilize together with glibc-2.26!
+KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 ~m68k ~mips ppc ppc64 ~riscv ~s390 sparc x86 ~amd64-linux ~x86-linux"
+
+IUSE="static-libs"
+
+DEPEND="
+	>=net-libs/libtirpc-1.2.0:=[${MULTILIB_USEDEP}]
+"
+RDEPEND="${DEPEND}
+	!<sys-libs/glibc-2.26
+"
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-1.3.0-rpath.patch
+)
+
+multilib_src_configure() {
+	local myconf=(
+		--enable-shared
+		$(use_enable static-libs static)
+	)
+	ECONF_SOURCE=${S} econf "${myconf[@]}"
+}
+
+multilib_src_install_all() {
+	einstalldocs
+	find "${ED}" -type f -name '*.la' -delete || die
+}

sdk_container/src/third_party/portage-stable/net-libs/libnsl/libnsl-2.0.0-r1.ebuild

@@ -0,0 +1,46 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit multilib-minimal preserve-libs
+
+DESCRIPTION="Public client interface for NIS(YP) in a IPv6 ready version"
+HOMEPAGE="https://github.com/thkukuk/libnsl"
+SRC_URI="https://github.com/thkukuk/${PN}/releases/download/v${PV}/${P}.tar.xz"
+
+# This is a core package which is depended on by e.g. PAM in some cases.
+# Please use preserve-libs.eclass in pkg_{pre,post}inst to cover users
+# with FEATURES="-preserved-libs" or another package manager if SONAME
+# changes.
+SLOT="0/3"
+LICENSE="LGPL-2.1+"
+KEYWORDS="~alpha amd64 arm arm64 hppa ~ia64 ~loong ~m68k ~mips ppc ppc64 ~riscv ~s390 sparc x86 ~amd64-linux ~x86-linux"
+IUSE="static-libs"
+
+DEPEND=">=net-libs/libtirpc-1.2.0:=[${MULTILIB_USEDEP}]"
+RDEPEND="${DEPEND}
+	!<sys-libs/glibc-2.26
+"
+
+multilib_src_configure() {
+	local myconf=(
+		--enable-shared
+		$(use_enable static-libs static)
+	)
+
+	ECONF_SOURCE=${S} econf "${myconf[@]}"
+}
+
+multilib_src_install_all() {
+	einstalldocs
+	find "${ED}" -type f -name '*.la' -delete || die
+}
+
+pkg_preinst() {
+	preserve_old_lib /usr/$(get_libdir)/libnsl.so.2
+}
+
+pkg_postinst() {
+	preserve_old_lib_notify /usr/$(get_libdir)/libnsl.so.2
+}

sdk_container/src/third_party/portage-stable/net-libs/libnsl/metadata.xml

@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="project">
+		<email>toolchain@gentoo.org</email>
+		<name>Gentoo Toolchain Project</name>
+	</maintainer>
+	<maintainer type="project">
+		<email>base-system@gentoo.org</email>
+		<name>Gentoo Base System Project</name>
+	</maintainer>
+	<upstream>
+		<remote-id type="github">thkukuk/libnsl</remote-id>
+	</upstream>
+</pkgmetadata>