[CLA] signature for xyvs

closes odoo/odoo#30372

doc/cla/individual/xyvs.md

+Mexico, 18-01-2018
+
+I hereby agree to the terms of the Odoo Individual Contributor License
+Agreement v1.0.
+
+I declare that I am authorized and able to make this agreement and sign this
+declaration.
+
+Signed,
+
+José Francisco Martínez Salgado admin@jofranmtz.com https://github.com/xyvs