spec: Avoid using makeinstall relic

The macro was made to help installing broken packages that did not use
DESTDIR correctly by overriding individual path variables (prefix,
sysconfdir, ...). Newer rpm provides fixed make_install macro that calls
make install with just the correct DESTDIR, however it is not available
everywhere (e.g., RHEL 5 does not have it). On the other hand the
make_install macro is simple and straightforward enough for us to use
its expansion directly.

libvirt.spec.in

@@ -1336,7 +1336,11 @@ gzip -9 ChangeLog
 %install
 rm -fr %{buildroot}
 
-%makeinstall SYSTEMD_UNIT_DIR=%{buildroot}%{_unitdir}
+# Avoid using makeinstall macro as it changes prefixes rather than setting
+# DESTDIR. Newer make_install macro would be better but it's not available
+# on RHEL 5, thus we need to expand it here.
+make install DESTDIR=%{?buildroot} SYSTEMD_UNIT_DIR=%{_unitdir}
+
 for i in domain-events/events-c dominfo domsuspend hellolibvirt openauth python xml/nwfilter systemtap
 do
   (cd examples/$i ; make clean ; rm -rf .deps .libs Makefile Makefile.in)