Update Python 2 dependency declarations to new packaging standards

gflags.spec

@@ -1,6 +1,6 @@
 Name:           gflags
 Version:        2.1.2
-Release:        6%{?dist}
+Release:        7%{?dist}
 Summary:        Library for commandline flag processing
 
 Group:          Development/Tools
@@ -8,7 +8,7 @@ License:        BSD
 URL:            https://gflags.github.io/gflags/
 Source0:	https://github.com/%{name}/%{name}/archive/v%{version}/%{name}-%{version}.tar.gz
 Patch1:         gflags-0001-Set-VERSION-property-of-library-targets-to-major.patch
-BuildRequires:  python-setuptools
+BuildRequires:  python2-setuptools
 BuildRequires:  cmake
 
 %description
@@ -61,6 +61,10 @@ ctest
 %{_libdir}/cmake/%{name}
 
 %changelog
+* Thu Mar 15 2018 Iryna Shcherbina <ishcherb@redhat.com> - 2.1.2-7
+- Update Python 2 dependency declarations to new packaging standards
+  (See https://fedoraproject.org/wiki/FinalizingFedoraSwitchtoPython3)
+
 * Wed Feb 07 2018 Fedora Release Engineering <releng@fedoraproject.org> - 2.1.2-6
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild