dev-libs/npth: Sync with Gentoo

It's from Gentoo commit 2cbdd9d36f13b1b7892c388edd8f52e6ce6e0c53.

sdk_container/src/third_party/portage-stable/dev-libs/npth/Manifest

@@ -1 +1,2 @@
 DIST npth-1.6.tar.bz2 300486 BLAKE2B 665fdb2f4cbe59750b6b4b7c2701ee80a23a122df10c9f8be47c4af5f3bf5968f709637ab3f4878bb68609752fbb6ce1364e109fdfeba64e4db258733a33f3fc SHA512 2ed1012e14a9d10665420b9a23628be7e206fd9348111ec751349b93557ee69f1176bcf7e6b195b35b1c44a5e0e81ee33b713f03d79a33d1ecd9037035afeda2
+DIST npth-1.7.tar.bz2 313213 BLAKE2B 39bc5857fb61a4264bef6ff23c28755d2a3b3ceef93034aefd5cf1c2ad905adf696c6753ebd5cea5e0a875df4ecb97db03e023a50a27f51ec0641bbc36b54089 SHA512 8893023bcf953a3f7c490cf8116bed323a9d4af2bea35277e919f437916fda8b8e68ded28ec1777717cf9187c504892556159cbdb8bc02ed4a8b30b3d897d244

sdk_container/src/third_party/portage-stable/dev-libs/npth/npth-1.7-r1.ebuild

@@ -0,0 +1,35 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit autotools flag-o-matic
+
+DESCRIPTION="New GNU Portable Threads Library"
+HOMEPAGE="https://git.gnupg.org/cgi-bin/gitweb.cgi?p=npth.git"
+SRC_URI="mirror://gnupg/${PN}/${P}.tar.bz2"
+
+LICENSE="LGPL-2.1+"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~arm64-macos ~ppc-macos ~x64-macos ~x64-solaris"
+IUSE="test"
+RESTRICT="!test? ( test )"
+
+src_prepare() {
+	default
+	eautoreconf
+}
+
+src_configure() {
+	append-ldflags $(test-flags-CCLD -Wl,--undefined-version)
+
+	econf $(use_enable test tests) \
+		--enable-install-npth-config
+}
+
+src_install() {
+	default
+
+	# no static archives
+	find "${ED}" -name '*.la' -delete || die
+}