move BuildRequires under subpackages

Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>

python-distro.spec

@@ -6,7 +6,6 @@
 %global with_python3 1
 %endif
 
-
 Name:           python-%{pypi_name}
 Version:        1.0.0
 Release:        7%{?dist}
@@ -17,14 +16,6 @@ URL:            https://github.com/nir0s/distro
 Source0:        https://files.pythonhosted.org/packages/source/d/%{pypi_name}/%{pypi_name}-%{version}.tar.gz
 BuildArch:      noarch
  
-BuildRequires:  python-setuptools
-BuildRequires:  python2-devel
-
-%if 0%{with_python3}
-BuildRequires:  python3-setuptools
-BuildRequires:  python3-devel
-%endif
-
 %global _description \
 The distro (for: Linux Distribution) package provides information about the\
 Linux distribution it runs on, such as a reliable machine-readable ID, or\
@@ -44,7 +35,12 @@ for more information.
 %package -n     python2-%{pypi_name}
 Summary:        %{summary}
 %{?python_provide:%python_provide python2-%{pypi_name}}
- 
+BuildRequires:  python2-devel
+%if 0%{?rhel} && 0%{?rhel} <= 7
+BuildRequires:  python-setuptools
+%else
+BuildRequires:  python2-setuptools
+%endif
 Requires:       /usr/bin/lsb_release
 
 %description -n python2-%{pypi_name} %{_description}
@@ -55,7 +51,8 @@ Python 2 version.
 %package -n     python3-%{pypi_name}
 Summary:        %{summary}
 %{?python_provide:%python_provide python3-%{pypi_name}}
- 
+BuildRequires:  python3-devel
+BuildRequires:  python3-setuptools
 Requires:       /usr/bin/lsb_release
 
 %description -n python3-%{pypi_name} %{_description}