DEVELOPERS: add myself as the ts5500 maintainer

Add a new entry for myself listing the TS-5500 board directory and
defconfig file.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 79586d2ed5c47a59a3142678e9c414c74589194f)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

DEVELOPERS

@@ -1831,6 +1831,10 @@ F:	package/pixz/
 N:	Vinicius Tinti <viniciustinti@gmail.com>
 F:	package/python-thrift/
 
+N:	Vivien Didelot <vivien.didelot@savoirfairelinux.com>
+F:	board/technologic/ts5500/
+F:	configs/ts5500_defconfig
+
 N:	Volkov Viacheslav <sv99@inbox.ru>
 F:	package/v4l2grab/
 F:	package/zbar/