[CLA] signature for doun

closes odoo/odoo#29009

doc/cla/individual/doun.md

+China, 2018-11-20
+
+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,
+
+doun doun@163.com https://github.com/doun