dev-libs/userspace-rcu: Sync with Gentoo

It's from Gentoo commit 8c0ea437ce9f58837bca8f2ff7ec8725231ed4f2.

sdk_container/src/third_party/portage-stable/dev-libs/userspace-rcu/Manifest

@@ -1,2 +1,3 @@
 DIST userspace-rcu-0.14.0.tar.bz2 661322 BLAKE2B ba9fa4c6dec693d2616234187db531f00fc0ade65f7e2a57182d9441728ddfa6f3e9d4544b824ca5edf7c027a43c9231d998a309c01f4bbab1eeefe856344f77 SHA512 7297e51012f4c44ee27c0e18ed9d87bf24be34db68a5398394c1e683a045bb561cf74aa913398404c0ed5cb8011af728ea12947717fa5f27627e5ca78e63a40f
 DIST userspace-rcu-0.14.1.tar.bz2 669999 BLAKE2B 6ae6a98020f731b5dc3bef5e7cf1a0b590087dbaff8836a4d2b694ad8d0d76b298261d99bea4281907cb516980b69c673d80baac17ae244e2f4fe690fc539293 SHA512 46137525854164df05326202909689b62f8f3aa6e04127eb9157a83aed8180f35a68332ec66e4e4fc9b0c046b64c64b492caed4b64f86f87a31579e4209ec345
+DIST userspace-rcu-0.15.0.tar.bz2 683414 BLAKE2B 3502cd0acd6e8e1370a2fd369207a305b3138b0db3186a37a9511bcf2f9ba362787274b030b0138111fe1d4805acd95bbae00c4d2332f1a0761f02bdc7f89e38 SHA512 a0b543dcc6d1ace34c4f159074a439926bcec6708fde66db14022cfa6e8082d5d0430ad02dc036cc3902304357439bbacd89b3fc5f4ed9911716f2f0480af3e4

sdk_container/src/third_party/portage-stable/dev-libs/userspace-rcu/userspace-rcu-0.15.0.ebuild

@@ -0,0 +1,54 @@
+# Copyright 1999-2024 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit autotools
+
+DESCRIPTION="Userspace RCU (read-copy-update) library"
+HOMEPAGE="https://liburcu.org/"
+SRC_URI="https://lttng.org/files/urcu/${P}.tar.bz2"
+
+LICENSE="LGPL-2.1"
+SLOT="0/8" # subslot = soname version
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86"
+IUSE="static-libs test"
+RESTRICT="!test? ( test )"
+
+BDEPEND="test? ( sys-process/time )"
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-0.13.1-tests-no-benchmark.patch
+)
+
+src_prepare() {
+	default
+
+	# Needed for tests patch
+	# ... and refresh libtool (see https://github.com/gentoo/gentoo/pull/23973)
+	eautoreconf
+}
+
+src_configure() {
+	local myeconfargs=(
+		--enable-shared
+		$(use_enable static-libs static)
+	)
+
+	econf "${myeconfargs[@]}"
+}
+
+src_test() {
+	default
+
+	emake -C tests/regression regtest
+
+	# We don't run the benchmark tests.
+	rm tests/benchmark/test-suite.log || die
+}
+
+src_install() {
+	default
+
+	find "${ED}" -type f -name "*.la" -delete || die
+}