mailmap: Update mailmap with full names and emails

Helps with `git shortlog -ns`

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

.mailmap

@@ -20,3 +20,11 @@ Felipe Neves <ryukokki.felipe@gmail.com> <ryukokki.felipe@gmail.com>
 Amir Kaplan <amir.kaplan@intel.com> <amir.kaplan@intel.com>
 Anas Nashif <anas.nashif@intel.com> <anas.nashif@intel.com>
 Ruud Derwig <Ruud.Derwig@synopsys.com> <Ruud.Derwig@synopsys.com>
+Flavio Arieta Netto <flavio@exati.com.br>
+Nishikant Nayak <nishikantax.nayak@intel.com>
+Justin Watson <jwatson5@gmail.com>
+Johann Fischer <j.fischer@phytec.de>
+Jun Li <jun.r.li@intel.com>
+Xiaorui Hu <xiaorui.hu@linaro.org>
+Yannis Damigos <giannis.damigos@gmail.com> <ydamigos@iccs.gr>
+Vinayak Kariappa Chettimada <vinayak.kariappa.chettimada@nordicsemi.no> <vich@nordicsemi.no> <vinayak.kariappa@gmail.com>