dev-libs/userspace-rcu: Sync with Gentoo

It's from Gentoo commit 2451912c0edbe1db0beb8efd954b57fd28c8bd17.

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

@@ -2,3 +2,4 @@ DIST userspace-rcu-0.14.0.tar.bz2 661322 BLAKE2B ba9fa4c6dec693d2616234187db531f
 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
 DIST userspace-rcu-0.15.1.tar.bz2 682998 BLAKE2B c2b20099a4a9284f44031bb2d5f87ab03292896739115fdc741493d7f7c714b306a1981c1ff8164fb39ddf200634ddefdb757582b4891aa04cadd9dd8b51260a SHA512 164d369cc1375b6b71eaa26812aff8a294bfbdffde65c2668e5c559d215d74c1973681f8083bfde39e280ca6fe8e92aadc7c867f966a5769548b754c92389616
+DIST userspace-rcu-0.15.2.tar.bz2 684018 BLAKE2B 40b21b482acf26b4478b02ef1d6e7612504c0ab869c1ae8c5b1974decf5512a6240fe2f3817b29830eea0b94836b5ba6324fb0246b3355241d5a215c11de0060 SHA512 ded62f0cb4d6c78adf06235ca4dee36a213efcbfd9cc4e24525d8d29b1d746075f0fbe22d5cee1e38bca9920e0641f94507b640569a84c937e4bae99f53be7c1

sdk_container/src/third_party/portage-stable/dev-libs/userspace-rcu/userspace-rcu-0.15.2.ebuild

@@ -0,0 +1,54 @@
+# Copyright 1999-2025 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
+}