contrib/gitdm: add mapping for Loongson Technology

Please confirm you are happy with this mapping.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Acked-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20220929114231.583801-48-alex.bennee@linaro.org>

contrib/gitdm/domain-map

@@ -19,6 +19,7 @@ ibm.com         IBM
 igalia.com      Igalia
 intel.com       Intel
 linaro.org      Linaro
+loongson.cn     Loongson Technology
 lwn.net         LWN
 microsoft.com   Microsoft
 mvista.com      MontaVista