spec: Switch to latest Fedora bytecompile macros

https://docs.fedoraproject.org/en-US/packaging-guidelines/Python_Appendix/#manual-bytecompilation

Signed-off-by: Cole Robinson <crobinso@redhat.com>

virt-manager.spec.in

@@ -1,13 +1,5 @@
-# This package depends on automagic byte compilation
-# https://fedoraproject.org/wiki/Changes/No_more_automagic_Python_bytecompilation_phase_2
-%global _python_bytecompile_extra 1
-
 # -*- rpm-spec -*-
 
-# RPM doesn't detect that code in /usr/share is python3, this forces it
-# https://fedoraproject.org/wiki/Changes/Avoid_usr_bin_python_in_RPM_Build#Python_bytecompilation
-%global __python %{__python3}
-
 %global with_guestfs               0
 %global default_hvs                "qemu,xen,lxc"
 
@@ -124,6 +116,11 @@ machine).
     install -O1 --root=%{buildroot}
 %find_lang %{name}
 
+%if 0%{?py_byte_compile:1}
+# https://docs.fedoraproject.org/en-US/packaging-guidelines/Python_Appendix/#manual-bytecompilation
+%py_byte_compile %{python3} %{buildroot}%{_datadir}/virt-manager/
+%endif
+
 # Replace '#!/usr/bin/env python3' with '#!/usr/bin/python3'
 # The format is ideal for upstream, but not a distro. See:
 # https://fedoraproject.org/wiki/Features/SystemPythonExecutablesUseSystemPython