Merged update from upstream sources

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Source: https://src.fedoraproject.org/rpms/userspace-rcu.git#183b53f3f8614262c1a5a1fa03d18cd8fc985a34

userspace-rcu.spec

@@ -1,6 +1,6 @@
 Name:           userspace-rcu
 Version:        0.12.1
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        RCU (read-copy-update) implementation in user-space
 License:        LGPLv2+
 URL:            http://liburcu.org
@@ -10,6 +10,7 @@ Source1:        http://lttng.org/files/urcu/%{name}-%{version}.tar.bz2.asc
 # gpg2 --export --export-options export-minimal 2A0B4ED915F2D3FA45F5B16217280A9781186ACF > gpgkey-2A0B4ED915F2D3FA45F5B16217280A9781186ACF.gpg
 Source2:        gpgkey-2A0B4ED915F2D3FA45F5B16217280A9781186ACF.gpg
 Patch0:         regtest-without-bench.patch
+BuildRequires: make
 BuildRequires:  pkgconfig
 BuildRequires:  perl-Test-Harness
 BuildRequires:  autoconf automake libtool
@@ -84,6 +85,9 @@ make regtest
 
 
 %changelog
+* Wed Jan 27 2021 Fedora Release Engineering <releng@fedoraproject.org> - 0.12.1-3
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild
+
 * Wed Jul 29 2020 Fedora Release Engineering <releng@fedoraproject.org> - 0.12.1-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild