Update Python 2 dependency declarations to new packaging standards

protobuf.spec

@@ -12,7 +12,7 @@
 Summary:        Protocol Buffers - Google's data interchange format
 Name:           protobuf
 Version:        3.5.0
-Release:        4%{?dist}
+Release:        5%{?dist}
 License:        BSD
 URL:            https://github.com/google/protobuf
 Source:         https://github.com/google/protobuf/archive/v%{version}%{?rcver}/%{name}-%{version}%{?rcver}.tar.gz
@@ -112,10 +112,10 @@ lacks descriptors, reflection, and some other features.
 Summary:        Python 2 bindings for Google Protocol Buffers
 BuildArch:      noarch
 BuildRequires:  python2-devel
-BuildRequires:  python-setuptools
+BuildRequires:  python2-setuptools
 # For tests
-BuildRequires:  python-google-apputils
-Requires:       python-six >= 1.9
+BuildRequires:  python2-google-apputils
+Requires:       python2-six >= 1.9
 Conflicts:      %{name}-compiler > %{version}
 Conflicts:      %{name}-compiler < %{version}
 Obsoletes:      %{name}-python < 3.1.0-4
@@ -397,6 +397,10 @@ install -p -m 0644 %{SOURCE2} $RPM_BUILD_ROOT%{emacs_startdir}
 %endif
 
 %changelog
+* Wed Feb 21 2018 Iryna Shcherbina <ishcherb@redhat.com> - 3.5.0-5
+- Update Python 2 dependency declarations to new packaging standards
+  (See https://fedoraproject.org/wiki/FinalizingFedoraSwitchtoPython3)
+
 * Fri Feb 09 2018 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 3.5.0-4
 - Escape macros in %%changelog