mailmap: invert emails for Igor Gnatenko

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

.mailmap

@@ -6,7 +6,7 @@ Alexey Tourbin <alexey.tourbin@gmail.com> Alexey Tourbin <at@altlinux.ru>
 Andreas Scherer <andreas_scherer@alice.de> Andreas Scherer <andreas_github@freenet.de>
 Fionnuala Gunter <fin@linux.vnet.ibm.com> fin@linux.vnet.ibm.com <fin@linux.vnet.ibm.com>
 Fionnuala Gunter <fin.gunter@hypori.com> fin@linux.vnet.ibm.com <fin@linux.vnet.ibm.com>
-Igor Gnatenko <ignatenko@redhat.com> Igor Gnatenko <i.gnatenko.brain@gmail.com>
+Igor Gnatenko <i.gnatenko.brain@gmail.com> Igor Gnatenko <ignatenko@redhat.com>
 Jerome Quelin <jquelin@mageia.org> Jérôme Quelin <jquelin@mandriva.org>
 Jindrich Novy <jnovy@dhcp-lab-186.brq.redhat.com> Jindrich Novy <jnovy@redhat.com>
 Lubos Kardos <lkardos@redhat.com> Lubos Kardos <lkardos@localhost.localdomain>